CHEM01200604012 Dibakar Goswami - Homi Bhabha National ...

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T.; Hirama, M. Chem. Commun. 1997, 743. (k) Usugi, S.-I.; Yorimitsu, H.; Oshima, K. Tetrahedron Lett. 2001, 42, 4535. 67. (a) Nokami, J.; Ohga, M.; Nakamoto, H.; Matsubara, T.; Hussain, I.; Kataoka, K. J. Am. Chem. Soc. 2001, 123, 9168. (b) Hayashi, S.; Hirano, K.; Yorimitsu, H.; Oshima, K. Org. Lett. 2005, 7, 3577. (c) Hayashi, S.; Hirano, K.; Yorimitsu, H.; Oshima, K. J. Organometallic Chem. 2007, 692, 505. 68. Wasserscheid, P.; Kiem, W. Angew. Chem. Int. Ed. 2000, 39, 3772. 69. (a) Chauvin, Y.; Einloft, S.; Olivier, H. Ind. Eng. Chem. Res. 1995, 34, 1149. (b) Gilbert, B.; Chauvin, Y.; Olivier, H.; Di Macro-Van Tiggelen, F. J. Chem. Soc. Dalton Trans. 1995, 3867. (c) Gui, J.; Deng, Y.; Hu, Z.; Sun, Z. Tetrahedron Lett. 2004, 45, 2681. (d) Yeung, K, -S.; Farkas, M, E.; Qiu, Z.; Yang, Z. Tetrahedron Lett. 2002, 43, 5793. (e) Xu, L.; Chen, W.; Xiao, J. Organometallics, 2000, 19, 1123, and references cited therein. (f) Tait, S.; Osteryoung, R.A. Inorg. Chem. 1984, 23, 4352. (g) Jiang, T.; Gao, H.; Han, B.; Zhao, G.; Chang, Y.; Wu, W.; Gao, L.; Yang, G. Tetrahedron Lett. 2004, 45, 2699. (h) Gordon, C. M.; McCluskey, A. Chem. Commun. 1999, 1431. (i) Chen, W.; Xu, L.; Chatterton, C.; Xiao, J. Chem. Commun. 1999, 1247. (j) Song, C. E.; Shim, W. H.; Roh, E. J.; Choi, J. H. Chem. Commun. 2000, 1695. 70. (a) Wilkes, J.S.; Levisky, J.A.; Wilson, R.A.; Hussey, C.L. Inorg. Chem. 1982, 21, 1263. (b) Carlin, R.T.; Wilkes, J.S. In: Chemistry of Nonaqueous Solutions Mamantov, G.; Popov, A. I. eds., VCH, Weinheim, 1994, pp.277. (c) Chan, B.K.M.; Chang, N.H.; Grimmet, R.M. Aust.J.Chem.1977, 30, 2005. 71. Freemantle, M. Chem. Eng. News 1998, 76, 32. 220
72. Karodia, N.; Guise, S.; Newlands, J.; Anderson, -A. Chem. Commun. 1998, 2341. 73. (a) Cintas, P. Synlett 1995, 1087. (b) Podlech, J; Maier, T. C. Synthesis 2003, 633. 74. (a) Li, C. J.; Chan, T. H. Tetrahedron Lett. 1991, 32, 7017. (b) Li, C. J.; Chan, T. H. Tetrahedron 1999, 55, 11149. 75. (a) For reviews see: Araki, S.; Hirashita, T. Indium in Organic Synthesis In: Yamamoto, H. and Oshima, K. Ed., Main Group Metals in Organic Synthesis, Wiley-VCH, Weinheim 2004, pp-323. (b) Paquette, L.A. Synthesis 2003, 765– 774. (c) Loh, T.-P.; Yin, Z.; Song, H.-Y.; Tan, K.L. Tetrahedron Lett. 2003, 44, 911. (d) Augé, J.; Lubin-Germain, N.; Marque, S.; Seghrouchni, L. J. Organomet. Chem. 2003, 679, 79. (e) Loh, T.-P.; Zhou, J.-R. Tetrahedron Lett. 2000, 41, 5261. (f) Loh, T.-P.; Zhou, T.-P. Tetrahedron Lett. 1999, 40, 9115. 76. (a) Fujita, S.; Kanamaru, H.; Senboku, H.; Arai, M. Int. J. Mol. Sci. 2006, 7, 438. (b) Shaabani, A.; Soleimani, E.; Darvishi, M. Monatsh Chem. 2007, 138, 43. (c) Boovanahalli, S. K.; Kim, D. W.; Chi, D. Y. J. Org. Chem. 2004, 69, 3340. 77. (a) Law, M. C.; Cheung, T. W.; Wong, K. Y.; Chan, T. K. J. Org. Chem. 2007, 72, 923. (b) Law, M. C.; Wong, K. Y.; Chan, T. H. Green Chem. 2002, 4, 161. 78. Miao, W.; Chung, L. W.; Wu, Y. –D.; Chan, T. H. J. Am. Chem. Soc. 2004, 126, 13326. 221
Page 1:
ASYMMETRIC STRATEGIES FOR THE SYNTH
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ACKNOWLEDGEMENTS First of all, I wa
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CONTENTS SYNOPSIS LIST OF FIGURES L
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SYNOPSIS
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models (e. g. Cram’s model, Felki
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4 1d 4-(CH 3 ) 2 CH-C 6 H 4 1 : 1.5
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14. 1n C 6 H 5 CO C 6 H 5 2n 8 77 1
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imetallic systems. In all the cases
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For the benzylation reaction, the c
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O O 3 CHO i O O + OH 13a O O OH O O
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10 3.5 Ga (2.5) THF KI+LiCl 10 55 5
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multidrug-resistant (MDR) cancer ce
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directly afforded the furanose, whi
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References 1. Stephenson, G. R. Adv
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LIST OF FIGURES
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II.3.13 III.1.1 III.1.2 III.1.3 III
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IV.5.2 IV.5.3 IV.5.4 IV.5.5 1 H NMR
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Table Title Page No. II.3.1 II.3.2
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II. .11 PPREAMBLE Demand for specia
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II. .22 IINTRODUCTIION TO CHIIRALII
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The most dramatic example in this a
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H H 2 N OH COOH i PhH 2 CO O H N H
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Methods of Asymmetric Synthesis: 15
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O O O O i, ii iii iv HO HO N N OH O
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Models for Asymmetric Synthesis. 21
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If a strongly electronegative group
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enantiomeric products are formed at
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vi) The balance between chiral auxi
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IIII. .11 IINTRODUCTIION TO CHIIRAL
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Scheme II.1.2 However, availability
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Prof. R. Noyori received the Nobel
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Apart from the cinchona alkaloids,
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ligand, it assumes a tetrahedral co
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Marshall. 53 More recently, Barbero
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Various protocols have been develop
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In the absence of a sterically-bulk
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IIII. .33. . PPRESSENT WORK It is w
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[pyridinium][Sn 2 Cl 5 ] etc. can b
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RCHO 59a-j i R OH 60a-j (i) Allyl b
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Fig. II.3.2. 1 H NMR spectrum of 60
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in [bmim][BF 4 ] using sub-stoichio
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The reaction in THF was also follow
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The integration of the signal at δ
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The standard reduction potential of
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It has also been reported, 83a,b th
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IIII. .33. .33 Gaal lliuum meeddi i
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5 3.0 5.0 THF LiCl+KI c 14 d 71 6 1
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3 59d 4-(CH 3 ) 2 CH-C 6 H 4 H 60d
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Fig. II.3.8. 13 C NMR spectrum of 6
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Fig. II.3.10. 13 C NMR spectrum of
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fragmentation peak at m/z 138 (19%)
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Fig. II.3.13. 13 C NMR spectrum of
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active catalyst, as suggested for t
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1-(4-Bromophenyl)-but-3-en-1-ol 59b
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1H), 7.90-7.93 (m, 1H); 13 C NMR:
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662, 980, 1079, 1332, 1374 cm -1 .
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IIIIII. .11 DIIASSTEREOSSELECTIIVE
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cyclohexylideneglyceraldehyde (1) 3
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mixture of Zn dust, allyl or γ-sub
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Fig. III.1.2. 13 C NMR spectrum of
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Reaction with crotyl bromide: In ca
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Fig. III.1.5. 1 H NMR spectrum of 6
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The formation of the 2,3-anti addit
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To establish the C-4 configuration
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Allylation with (E) and (Z)-1-bromo
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(i) Zn, aqueous satd. NH 4 Cl, THF,
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Fig. III.1.12. 1 H NMR spectrum of
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Allylation with 1-Bromo-4-(tert)-bu
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fast and gave a significantly bette
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espectively) due to the cyclohexyli
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was treated with excess amount of b
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Fig. III.1.20. 1 H NMR spectrum of
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stereochemistry of allylation of β
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of the products were modest (48-62%
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6 1.2 In (2.0) H 2 O LiCl+ KI 14 72
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are consistent with our previous re
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III.3 EXPERIMENTAL SECTION: General
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(2R,3R)-1,2-Cyclohexylidenedioxy-5-
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for an additional 2 h, gradually br
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(m, 2H), 5.82-5.98 (m, 1H), 7.25-7.
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31.6, 32.2, 63.4, 128.8, 133.0. Ana
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23 (2R,3S,4R)-1,2-Cyclohexylidenedi
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(2R,3S,4S)-1,2-Cyclohexylidenedioxy
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(m, 1H), 3.50-4.02 (m, 5H), 4.10-4.
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and dried. Removal of solvent in va
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ine, and dried. Solvent removal und
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IIV. .11 SSYNTHESSIISS OFF ENANTIIO
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Scheme IV.1.1 The same group also d
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IV.1.3: Present work Although sever
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O O C 6 H 13 i O C 6 H 13 ii OH C 6
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Fig. IV.1.4. 1 H NMR spectrum of 10
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the unit-C contribute positively to
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tartrate, Ti(O-i-Pr) 4 , CH 2 Cl 2
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Based on this hypothesis, the alcoh
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OR 3 O R 1 R 2 NaBH 4 H H R 1 R 1 +
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(OH). Oxidative cleavage of its α-
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IIV. .33: : SSYNTHESSIISS OFF 33' '
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For the actual synthesis, (Scheme I
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IV.4: SSYNTHESSIISS OFF 22( (SS) )-
Page 213 and 214: (i) PhCHO, triethyl orthoformate, M
Page 215 and 216: O N 3 II Ph HO OH b1 N 3 Ph O O Ben
Page 217 and 218: Fig. IV.4.2. 1 H NMR spectrum of 91
Page 219 and 220: Thus, easily accessible 1 has been
Page 221 and 222: 167 and subsequent reduction gave 1
Page 223 and 224: from the appearance of 13 C NMR pea
Page 225 and 226: Fig. IV.5.2. 1 H NMR spectrum of 17
Page 227 and 228: IV.6 EXPERIMENTAL SECTION (2R,3S,4R
Page 229 and 230: As described earlier, compound 108
Page 231 and 232: 19.5, 23.8, 23.9, 25.1, 26.9, 34.6,
Page 233 and 234: 74.2, 74.4, 110.1, 116.7, 127.6, 12
Page 235 and 236: mmol) in MeOH (10 mL), work up, fol
Page 237 and 238: 7.51 (m, 3H), 7.92-8.08 (m, 2H); 13
Page 239 and 240: subsequent isolation afforded rotam
Page 241 and 242: 4.18 (t, J = 3.4 Hz, 1H), 4.75-4.84
Page 243 and 244: -4.21 (c 1.2, CHCl 3 ); IR: 3466, 1
Page 245 and 246: (3R)- 3,4-O-Cyclohexylidene-2-oxo-1
Page 247 and 248: Water and EtOAc was added to the mi
Page 249 and 250: 24 179. Yield: 1.49 g (77.5%); colo
Page 251 and 252: 24 furnished pure 183. Yield: 0.37
Page 253 and 254: 1. Wender, P. A. Chem. Rev. 1996, 9
Page 255 and 256: 17. Hanessian, S.; Maji, D. K.; Gov
Page 257 and 258: 32. For some selective references s
Page 259 and 260: 43. (a) Cleare, M. J.; Hydes, P. C.
Page 261 and 262: 54. Barbero, A.; Pulido, F. J.; Rin
Page 263: 2008, 1681. (d) Fargeas, V.; Zammat
Page 267 and 268: Kaminski, J.; Millhauser, G.; Ortiz
Page 269 and 270: Böhm, V. P. W.; Reisinger, C. J. O
Page 271 and 272: 119. Wender, P. A.; Holt, D. A.; Si
Page 273 and 274: 140. (a) Chemler, S. R.; Roush, W.
Page 275 and 276: Lett. 1996, 107, 53. (c) Smith, C.
Page 277 and 278: 158. Mitsuya, H.; Weinhold, K. J.;
Page 279 and 280: L.; Zugay, J. A. J. Med. Chem. 1993
Page 281 and 282: 1. Goswami, D.; Chattopadhyay, A.;
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