The Peterson reaction of (4R)-N-(trimethylsilyl)methyl-4-alkyloxazolidin-2-one gives (E/Z)-(4R)-N-(2,3- diphenylbut-1-enyl)-4-alkyloxazolidin-2-ones (enecarbamates) with increasing (Z)-selectivity and moderate-to-high diastereoselectivity in the individual E isomer as a function of increasing temperature. X-ray structure of the Peterson adduct, (4R,3S)-N-(2,3-diphenyl-2-hydroxy-but-1-enyl)-4-alkyloxazolidin-2-one (enecarbamates), reveals the rationale for the formation of a single isomer through syn elimination. The optically pure enecarbamates obtained with the Peterson adduct were further employed for photochemical and photophysical studies.
(4R)-N-(trimethylsilyl)methyl-4-alkyloxazolidin-2-one 的彼得森反应生成了 (E/Z)-(4R)-N-(2,3
-二苯基-2-羟基-1-
丁烯基)-4-烷基
恶唑啉-2-酮(烯碳酰胺),随着温度的升高,(Z)-选择性不断增加,单个 E 异构体的非对映选择性从中等到较高不等。Peterson 加合物 (4R,3S)-N-(2,3
-二苯基-2-羟基-丁-1-烯基)-4-烷基
恶唑烷-2-酮(enecarbamates)的 X 射线结构揭示了通过合成消除形成单一异构体的原理。利用彼得森加合物获得的光学纯净的烯
碳酸盐被进一步用于光
化学和光物理研究。