Reactions of nitronates derived from simple nitro alkanes with some thio-stabilized cationic intermediates
作者:I. M. Lyapkalo、M. I. Lazareva、A. D. Dil'man、S. L. Ioffe、W. A. Smit
DOI:10.1007/bf02496167
日期:1999.3
Trimethylsilyl and DBU nitronates derivedfrom nitromethane and nitropropanes do not undergoC-alkylation by episulfonium (ESI) or thiophanium (TPI) cationic intermediates. The above-mentioned derivatives of 1-nitropropane react with ESI and TPI to give the corresponding products ofO-alkylation of 1-chloro-1-oxyiminopropane. The reactions of DBU nitronates derivedfrom nitromethane and 2-nitropropane
Reactions of silyl nitronates with dimethylformamide dimethyl acetal as a new general procedure for the synthesis of 2-nitroenamines
作者:Alexander S. Shved、Andrey A. Tabolin、Yulia A. Khomutova、Sema L. Ioffe
DOI:10.1016/j.tetlet.2014.09.071
日期:2014.11
Silyl nitronates obtained in situ from the corresponding aliphatic nitro compounds react with dimethylformamide dimethyl acetal giving 2-nitroenamines in moderate to good yields. The reaction pathway is discussed.
Asymmetric silyl nitronate cycloadditions with bornane-10,2-sultam derivatives
作者:Byeang Hyean Kim、Ju Young Lee
DOI:10.1016/s0957-4166(00)80032-4
日期:——
Asymmetric silyl nitronate cycloadditions with N-acryloyl (2R)-bornane-10,2-sultam, N-acryloyl (2S)-bornane-10,2-sultam, and N-methacryloyl (2R)-bornane-10,2-sultam have been studied. The asymmetric silyl nitronate cycloaddition/elimination methodology provides a general route for the asymmetric synthesis of 2-isoxazolines.
Asymmetric induction in silyl nitronate cycloadditions to Oppolzer's chiral sultam derivatives
作者:Byeang Hyean Kim、Ju Young Lee、Kimoon Kim、Dongmok Whang
DOI:10.1016/s0957-4166(00)82151-5
日期:1991.1
Silyl nitronate cycloadditions to Oppolzer's chiral sultam derivatives, followed by the elimination of the sily alcohols from the resulting N-silyloxyisoxazolidines, provide DELTA-2-isoxazolines in good stereoselectivity (ca. 89/11). The favored transition state is suggested in the light of the X-ray crystal structure of a major cycloadduct.