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Nitrile Oxides, Nitrones, and Nitronates in Organic Synthesis : Novel ...

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476 NITRONATES<br />

Table 3.2 (cont<strong>in</strong>ued)<br />

10 trans-<br />

PhCH = CHNO2<br />

MgBr<br />

Me3Si<br />

11 Pr i NO2 MgBr Me3Si<br />

12 trans-<br />

ArCH = CHNO2<br />

(Ar–4-MeO-Ph)<br />

13 trans-<br />

ArCH = CHNO2<br />

(Ar–4-MeO-Ph)<br />

14 trans-<br />

ArCH = CHNO2<br />

(Ar–4-MeO-Ph)<br />

15 NO 2<br />

16 NO2<br />

17 NO2<br />

18 NO 2<br />

19 NO2<br />

20 NO 2<br />

<strong>and</strong> Et 3N<br />

MgBr Me3Si<br />

NH<br />

MgBr<br />

Me3Si<br />

Me3Si<br />

NCCH2Li c Me3Si<br />

CH2 = N(O)OLi Me3Si<br />

(EtO)2P(O)<br />

CH2Li<br />

OLi<br />

OEt<br />

OLi<br />

Me<br />

Me3Si<br />

Me3Si<br />

Me3Si<br />

Me3Si<br />

a Not <strong>in</strong>volved <strong>in</strong> <strong>in</strong>tramolecular cycloaddition.<br />

b With addition hexamethylphosphoramide (HMPA).<br />

c With addition RCOCH=CH2 for <strong>in</strong>termolecular trapp<strong>in</strong>g of SENA.<br />

d After elim<strong>in</strong>ation of Me3SiOH from [3 + 2]-cycloaddition’s product.<br />

R<br />

R<br />

R<br />

R<br />

R<br />

R<br />

O<br />

O<br />

O<br />

Ph<br />

N<br />

O<br />

62 d 199<br />

H<br />

Pri 18d 199<br />

O<br />

O<br />

O<br />

N<br />

O<br />

H<br />

Ar 43d 199<br />

H<br />

Ar<br />

N<br />

O<br />

N<br />

O<br />

H<br />

Ar OSiMe3<br />

N<br />

N O<br />

O N<br />

O N<br />

O N<br />

O N<br />

O N<br />

O N<br />

CN<br />

NO 2<br />

PO(OEt)2<br />

CO2Et<br />

COMe<br />

COPh<br />

58 d 199<br />

60 200<br />

84(R = Me) d ;<br />

66(R = OMe) d<br />

50 d (R=Me);<br />

55 d (R = OMe)<br />

65 d (R=Me);<br />

53 d (R = OMe)<br />

65 d (R=Me);<br />

61 d (R = OMe)<br />

78 d (R=Me);<br />

65 d (R = OMe)<br />

72 d (R=Me);<br />

66 d (R = OMe)<br />

201<br />

201<br />

201<br />

201<br />

201<br />

201

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