1-(3,4-Dihydro-4-oxoquinazolin-3-yl)aziridines (Q-substituted aziridines): ring-opening reactions with C–N bond cleavage and preparation of Q-free chirons
作者:Robert S. Atkinson、Andrew P. Ayscough、William T. Gattrell、Tony M. Raynham
DOI:10.1039/b004798h
日期:——
The presence of the Q group in ring-opening reactions of N-(Q)-aziridines 3, 4, 5 and 6 has been found to be advantageous in the following ways, (i) nucleophilic ring-opening by cuprate or by azide with inversion of configuration is assisted by the electron-withdrawing character of the Q group, (ii) ring-opening of aziridines 5 or 6 to the corresponding alcohols 36 and 23 with retention of configuration