Asymmetric synthesis of (S)- and (R)-[2-2H1]glycine via photolysis of optically active chromium carbene complexes. A comparison of stereoselectivity between chromium ketene complexes, ketenes, and ester enolates
作者:Louis S. Hegedus、Elena Lastra、Yukitoshi Narukawa、Daniel C. Snustad
DOI:10.1021/ja00034a035
日期:1992.4
]glycine («chiral glycine») were synthesized in good yield with high deuterium incorporation and ee's of 82-86% by two different routes. Photolysis of opticallyactive oxazolidine carbene chromiumcomplexes and lithiation-deuteration of opticallyactive α-oxazolidinone acetic esters were carried out. The stereoselectivities of the reactions of ketenes and chromium-bound ketenes with methanol-d were compared
(S)- 和 (R)-[2- 2 H i ] 甘氨酸(«手性甘氨酸»)通过两种不同的途径以高氘掺入和 82-86% 的 ee 产率合成。进行了旋光性恶唑烷卡宾铬配合物的光解和旋光性 α-恶唑烷酮乙酸酯的锂化-氘化。比较乙烯酮和铬键乙烯酮与甲醇-d反应的立体选择性