作者:Stephen G. Davies、A. Christopher Garner、Rebecca L. Nicholson、James Osborne、Edward D. Savory、Andrew D. Smith
DOI:10.1039/b306323m
日期:——
Asymmetric [3,3]-sigmatropic aza-Claisen rearrangement of the (Z)-N-allyl-N,O-silylketene aminal of (3S,4E,αR)-1-benzyloxy-3-(N-propionyl-N-α-methylbenzylamino)hex-4-ene furnishes (2S,3R,4E,αR)-N-α-methylbenzyl-2,3-dimethyl-7-benzyloxyhept-4-enamide in >92% d.e.; rearrangement of the diastereomeric (3R,4E,αR)-(Z)-N,O-silylketene aminal proceeds with low diastereoselectivity.
(3S,4E,αR)-1-苄氧基-3-(N-丙酰基-N-α-甲基苄基氨基)己-4-烯的(Z)-N-烯丙基-N,O-硅酮胺的不对称 [3,3]-sigmatropic aza-Claisen 重排生成(2S,3R,4E,αR)-N-α-甲基苄基-2,3-二甲基-7-苄氧基庚-4-烯酰胺,d. >92%。e.; 非对映异构体 (3R,4E,αR)-(Z)-N,O-硅酮酰胺的重排以低非对映选择性进行。