Handbook of Functionalized Organometallics Applications in S

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308 7 Polyfunctional Zinc Organometallics for Organic Synthesis AcO CHO AcO Pent PhCHO Me OHC + + NMe 2 351 Ph Me NH 2 OTBS + Cu(CN)ZnI CO 2Et CH 2ZnBr CN 353 . BF3 Et2O -78 ºC Zn 2 18 h, -30ºC 5M LiClO 4 ether, Me 3SiCl, rt OH AcO AcO Pent EtO2C 350 :55% HO Me NMe 2 Me OTBS 352 :82% one diastereoisomer Ph Ph NH CN 354 :60%;70%de Scheme 7.93 Addition reactions of zinc and copper±zinc reagents to carbonyl compounds. Ph N OEt O 1) ZnBr2,20ºC 2) tert-BuZnBr, ether, 0 ºC, 1 h OMe 355 3) NH4Cl Ph N H t-Bu t-Bu OMe 356 :68% CO 2Et Scheme 7.94 Addition of a tertiary alkylzinc reagent to a chiral iminoester. O Cl N N Cl OEt PhOCOCl + CO 2Me Cl N Cu(CN)ZnI Cl O OPh Cl Cu(CN)ZnI CO 2Me N CO 2Et H2,Pd/C ethanol H2N CO2Et 20 ºC (R)-357 :100%;85%ee Cl Cl N CO2Ph 66 % o-chloranil toluene, reflux Scheme 7.95 Addition of copper±zinc reagents to pyridinium salts. CO 2Me N 57%
7.3 Reactions of Organozinc Reagents 7.3.2.4 Michael Additions Organocopper reagents derived fromorganolithiumor magnesiumderivatives add readily to various Michael acceptors [64]. The zinc±copper reagents obtained by reacting organozinc halides with CuCN´2LiCl undergo numerous 1,4-addition reactions with various Michael acceptors. The presence of TMSCl is especially useful and effective [216]. It assures high yields of the conjugate adducts. Thus, the addition of various polyfunctional zinc±copper reagents with cyclohexenone provides the desired 1,4-addition product 358 in the presence of TMSCl in 95% yield [10, 217]. Sterically hindered enones, such as 3-cyclohexyl-2-cyclohexen-1one 359 undergoes a conjugate addition in the presence of BF 3´OEt 2 affording the ketone 360 bearing a quaternary center in b-position (Scheme 7.96) [48a]. Unsaturated copper reagents are best added via alkenylzirconiumspecies that are readily prepared by hydrozirconation. In the presence of catalytical amounts of Me 2Cu(CN)Li 2, they add to various enones affording the unsaturated ketones of type 361 in satisfactory yield (Scheme 7.96) [21]. CN O O Cu(CN)ZnI + TMSCl, THF -78 to 25ºC TIPSO O 359 c-Hex + Cl Cu(CN)ZnI 1) Cp2Zr(H)Cl 2) MeLi, Me3ZnLi Me2Cu(CN)Li2 (cat) 3) cyclopentenone . BF3 Et2O THF -30 to 0ºC O NC 358 :97% 361 :88% Scheme 7.96 Michael addition of zinc±copper reagents to enones. O Cl c-Hex 360 :97% OTIPS Arylzinc reagents, obtained by the electrochemical reduction of the corresponding aromatic chloride or bromide using a sacrificial zinc electrode, allows the preparation of zinc reagents bearing a keto group [36]. Exo-methylene ketones such as 362 add various copper±zinc reagents. This methodology has been applied for the synthesis of various prostaglandines, such as 363 [218]. Enantioselective Michael additions have been pioneered by Feringa and coworkers [219] and Alexakis and coworkers [220]. Remarkably, only a catalytic amount of the chiral ligand 364 (4 mol%) and of Cu(OTf) 2 (2 mol%) is required. The 1,4-addition product 365 is obtained with an enantiomeric excess of 93% ee [219a]. It has been applied 309
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Organometallics. Paul Knochel Copyr
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Handbook of Functionalized Organome
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Contents Preface XV List of Authors
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Contents 3.3.9 Oxidation of Functio
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6.3.1 Nucleophilic Addition onto Ca
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9.2.3 Preparation of Functionalized
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13.6.4 Nickel-Catalyzed Cross-coupl
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Preface Since the pioneering work o
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XVIII List of Authors Corinne Gosmi
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1 Introduction Paul Knochel and Fel
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umorganic is directly generated in
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Et H 21 Et AlBu 2 + CO 2Et Cu(CN)Mg
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8 2 Polyfunctional Lithium Organome
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10 2 Polyfunctional Lithium Organom
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R R 12 2 Polyfunctional Lithium Org
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MeO MeO R 14 2 Polyfunctional Lithi
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N 16 2 Polyfunctional Lithium Organ
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Li LiO 20 2 Polyfunctional Lithium
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Li 22 2 Polyfunctional Lithium Orga
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26 Ph O Ni-Pr 2 2 Polyfunctional Li
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28 Li 2 Polyfunctional Lithium Orga
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Li 32 203 2 Polyfunctional Lithium
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36 Br 2 Polyfunctional Lithium Orga
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3 Functionalized Organoborane Deriv
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Br SSiMe 2tBu 4 3.2 Preparation and
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B O O 3.2 Preparation and Reaction
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3.2 Preparation and Reaction of Fun
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Ar H Ar = O HB O CF 3 CF 3 3.2 Prep
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X X Cl Cl TfO Cl 3.2 Preparation an
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HO HO Br OH O X N N O N 3.2 Prepara
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MOMO MOMO I CbzN O 3.2 Preparation
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(HO) 3B O NMe 3 N N O Br 3.2 Prepar
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H H O O N H N H O OEt O O OEt O 3.2
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t BuO2C O N H 3.2 Preparation and R
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R H2O R R B(OH) 2 B(OH) 2 3.3 Prepa
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3.3 Preparation and Reactions of Fu
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R 124 BF 3K Br 3.3 Preparation and
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B O O I OR O OR O O O O O OR 3.3 Pr
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S N O B O I O 133 3.4 Preparation a
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3.5 Synthesis and Reactions of Func
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R TrocO S N R 1 O S N 13 12 O 1 160
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22 H. Nakamura, M. Fujiwara, Y. Yam
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102 K. A. Scheidt, A. Tasaka, T. D.
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4 Polyfunctional Magnesium Organome
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crystallize with four-coordinated M
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4.2Methods of Preparation of Grigna
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NC Br Br 4.2Methods of Preparation
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N N Ph I 4.2Methods of Preparation
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Cl MgBr 4.2Methods of Preparation o
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O O O O 4.2Methods of Preparation o
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O Me Me O Pent I 4.2Methods of Prep
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4.3 Further Applications of Functio
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OTIPS I iPrMgCl OTIPS 4.3 Further A
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4.4 Application of Functionalized M
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I O O OBn Pd(t-Bu 3P) 2 (10 mol%) 4
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Me OTf CO2Et + Me 4.4 Application o
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12 a) F. Bickelhaupt in H. G. Riche
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56 G. Varchi, C. Kofink, D. M. Lind
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kin Trans. 1 1992, 1393; b) M. Sato
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31, 805; J. F. Hartwig, Angew. Chem
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5 Polyfunctional Silicon Organometa
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stereocontrol [5]. Similar chiral c
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5.2 Allylic Silanes seven-membered
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SiMe 3 33 Pr OH OSiMe 3 SiMe 3 34 O
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5.2 Allylic Silanes Although alkyl
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R O Si H 60a (R = H) 60b (R = Me) R
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Bpin SiMe 2Ph (CH 2) 2Ph 73 EtCH(OE
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BnO HO SiMe2Ph 2 BnO CHO BnO O BF3
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5.3 Alkenylsilanes When the same st
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HO I O Si Mo cat. : m n I O Si 111
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5.4Alkylsilanes Transition metal-ca
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5.4Alkylsilanes The fluoride-induce
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5.5 Miscellaneous Preparations and
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5.5 Miscellaneous Preparations and
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716. (c)I. E. Markó, J.-M. Planche
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6 Polyfunctional Tin Organometallic
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phine ligand or Pd II (PPh 3) 2Cl 2
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Bu 3 Sn Scheme 6.4 n-Pent + Me I O
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N N N H 2 I Scheme 6.8 N + Me Sn 3
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O O O NaO HO Me P O OH O OH (+)-Fos
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6.2 Metal-Catalyzed Coupling Reacti
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6.2 Metal-Catalyzed Coupling Reacti
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6.3 Nucleophilic Additions a-hydrox
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6.3 Nucleophilic Additions oxy alde
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6.3 Nucleophilic Additions found ap
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6.3 Nucleophilic Additions 6.3.1.5.
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6.3 Nucleophilic Additions ethylami
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N H 91% (ee:84%) Scheme 6.31 N CO 2
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6.4 Radical Reactions of Organotins
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TsN Scheme 6.37 + Bu 3Sn O Ph AIBN
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6.5.2 Tin-to-lithium Exchange 6.5.2
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Ar OR Scheme 6.42 N H SnBu 3 n-BuLi
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References 1 D. Azarian, S. S. Dua,
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Commun., 2002, 2608±2609; W. Su, S
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110 Y. Obora, M. Nakanishi, M. Toku
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178 Y. Yamamoto, H. Yatagai, Y. Nar
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J. Chem. Soc., Chem. Commun., 1995,
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301 D. P. G. Hamon, R. A. Massy-Wes
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371 I. D. Gridnev, O. L. Tok, N. A.
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252 7 Polyfunctional Zinc Organomet
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358 8 Polyfunctional 1,1-Organodime
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CH 2(ZnI) 2 4 362 8 Polyfunctional
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9 Polyfunctional Organocopper Reage
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S 5 CuI·LiCl Cu(CN)Li Li naphthale
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Br CO 2Et I CO 2Et CO 2Et Np 2CuLi
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9.2 Preparation of Functionalized O
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Pent I O O Pent I CO 2Et O Br Pent
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Ph Ph N OMe 1) n-BuLi 2) alkynylcop
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9.3 Applications of Functionalized
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PrCu·MgBr 2·SMe 2 Pr Me H Pr H HO
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19 X. Yang, T. Rotter, C. Piazza, P
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n-C 7H 15 398 10 Functional Organon
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400 10 Functional Organonickel Reag
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O 424 10 Functional Organonickel Re
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TIPSO R 1 Cp 2ClZr O H 426 O N 10 F
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O 438 O Br 10 Functional Organonick
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Cl 442 CN 10 Functional Organonicke
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11 Polyfunctional Metal Carbenes fo
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11.2 Chromium-Templated Cycloadditi
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11.2 Chromium-Templated Cycloadditi
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(CO) 5Cr O Ph 15 1) t Bu t BuOMe, 5
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O MeO O O O O MeO O OMe Cr(CO) 5 Me
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11.2.3 Cyclization of Chromium Olig
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(CO)5Cr OR * O S + OMe 11.2 Chromiu
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[2+2+1] R 1 R 1 OH (CO) 5Cr R 2 (CO
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11.3 Reactions of Higher Nuclearity
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Br O X Br O R 2 R 2 O 85: X = Si-tB
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11.3 Reactions of Higher Nuclearity
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11.4 Metathesis Reactions Catalyzed
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R 2 R 1 O R O 3 O 11.4 Metathesis R
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i Pr i Pr i Pr Me Me (R)-160 Ph O O
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11.5 Transmetallation The dimerizat
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11.6 Metal Carbenes in Peptide Chem
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11.7 Stereoselective Syntheses with
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O O O O 100% H 2N O O O O O 311a Cr
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11.8 Sugar Metal Carbenes as Organo
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References zation reactions that al
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35 (a) C.A. Merlic, Y. You, D.M. Mc
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D. R. Cefalo, P. J. Bonitatebus Jr.
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12 Functionalized Organozirconium a
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12.2 Functionalized Organozirconoce
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Ph O (H)ZrCp Ph O 2Cl Ph O O O 92 %
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i-PrO O OBu-t O H N Scheme 12.15 H
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BnO Scheme 12.19 O BnO + 27 28 Cp 2
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R 1 O O O R R1 R 2 Scheme 12.28 R P
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12.3 Functionalized Organotitanium
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t-BuOOC Scheme 12.44 O CH 3 7.5 mol
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H 13C 6 O R Scheme 12.52 SiMe 3 O T
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O O OEt 87 Scheme 12.59 Scheme 12.6
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40 A. M. Sun, X. Huang, Heteroatom
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13 Manganese Organometallics for th
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13.2.2 Preparation of Organomangane
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13.3 1,2-Addition to Aldehydes and
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13.3.2 Manganese-Mediated Barbier-
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HeptMnX + HeptMnX + Scheme 13.17 Cl
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13.4 Preparation of Ketones by Acyl
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Me 3Si Cl ( ) 3 R Li 80% 82% Scheme
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13.5 1,4-Addition of Organomanganes
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BuM BuMgCl BuMnCl BuMgCl BuCu BuCu
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13.6 Transition-Metal-Catalyzed Cro
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13.6 Transition-Metal-Catalyzed Cro
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I Cl Scheme 13.56 MeO MnCl (1.2 equ
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13.7 Manganese-Mediated Cross-coupl
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13 C. Boucley, G. Cahiez, unpublish
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570 14 Polyfunctional Electrophilic
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η5 η6 η4 η7 574 14 Polyfunction
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51 594 CO 2Me + Fe(CO)3 CO2Me 14 Po
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Table 14.1 Examples of synthetic ap
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602 Entry Target molecule Disconnec
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Entry Target molecule Disconnection
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Target molecule Disconnections Mult
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15 Polyfunctional Zinc, Cobalt and
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Trifluoromethylzinc compounds prepa
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15.3 Electrochemical Synthesis and
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15.3.2 Carbon±Carbon Bond Formatio
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Cl Cl NC + MeO2C 1eq 2eq e, CoX 2 c
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1eq Br FG + R 2eq OAc e, CoX 2 cat
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Cl O + O e, FeBr 2(Bpy) n DMF, Fe a
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15.4 Electrosynthesis of Compounds
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FG CuCN/LiCl ZnBr 0ºC CuZnBrCN 15.
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15.5 General Conclusion (industrial
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17 Durandetti, M.; Devaud, M.; Peri
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I2 Index b-alkoxyalkylidenemalonic,
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I4 Index boronic ester 47 4-boronyl
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I6 Index cyclohexadiene 415 cyclohe
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I8 Index fluoroalkenylstannane 206
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I10 Index iron-catalyzed carbolithi
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I12 Index nickel-catalyzed carbozin
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I14 Index psicosecarbene complexes
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I16 Index Suzuki-Miyaura reaction a
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