摘要:
The [2+2] Staudinger cycloaddition between the C=N double bond of 2,3-dihydrobenzoxazepines 2 and 6 and a series of acetyl chlorides gave the azetidino[4,1-d][1,4]benzo oxazepines 3 and 7, 8, respectively. In the case of enantiopure 6, the cycloaddition diastereoselectivity was markedly dependent from the substituent alpha to the imine. (C) 2004 Elsevier Ltd. All rights reserved.