Synthesis and reactions of 3-hydroxy-2-nosyloxy esters produced by the stereoselective reduction of 2-nosyloxy-3-keto esters
作者:Robert V. Hoffman、Hwa Ok Kim
DOI:10.1021/jo00024a013
日期:1991.11
The reduction of 2-nosyloxy-3-keto esters is an effective method for the preparation of 3-hydroxy-2-nosyloxy esters. The reduction is stereoselective for the syn isomer. The anti isomer can be produced as the major product by the addition of p-nitrobenzenesulfonyl peroxide to ketene bis-silyl acetal derivatives of 3-hydroxy esters. The diastereomers are separable chromatographically and can be converted stereospecifically to glycidic esters and 2-azido-3-hydroxy esters. As such they appear to have excellent potential as versatile synthetic intermediates for the synthesis of 1,2,3-trifunctional substances.
Synthesis of 2-[[(p-nitrophenyl)sulfonyl]oxy] 3-keto esters from 3-keto esters and (p-nitrophenyl)sulfonyl peroxide
作者:Robert V. Hoffman、Anna Lee Wilson、Hwa Ok Kim
DOI:10.1021/jo00291a030
日期:1990.2
HOFFMAN, ROBERT V.;WILSON, ANNA LEE;KIM, HWA-OK, J. ORG. CHEM., 55,(1990) N, C. 1267-1270
作者:HOFFMAN, ROBERT V.、WILSON, ANNA LEE、KIM, HWA-OK