作者:James A. Workman、Neil P. Garrido、Julien Sançon、Edward Roberts、Hans Peter Wessel、J. B. Sweeney
DOI:10.1021/ja043768i
日期:2005.2.1
enantioselective [2,3]-sigmatropic rearrangements of acyclic allylic ammonium ylids are reported. Thus, a range of N-2'-[(N'-allyl-N',N'-dialkyl)ammonium]}acetyl camphor sultams undergo rearrangement at 0 degrees C in DME solution with high diastereofacial control (up to 99:1 dr) to give allylglycines in generally high yield. The power of the method has been demonstrated in a rapid and efficient synthesis of (R)-allyl
报告了无环烯丙基铵叶立德的高度对映选择性 [2,3]-σ 重排的第一个例子。因此,一系列 N-2'-[(N'-烯丙基-N',N'-二烷基)铵]}乙酰樟脑 sultams 在 DME 溶液中在 0 摄氏度进行重排,具有高非对映控制(高达 99: 1 dr) 以通常高产率得到烯丙基甘氨酸。该方法的强大功能已在 (R)-烯丙基甘氨酸的快速有效合成中得到证明。