摘要:
The base induced ring opening of beta-lactam derivatives, 3, 5, 7, 9, 11 with LDA gave gamma-lactam derivatives, 4, 6, 8, 10, 12 stereo selectively. The gamma-lactam derivatives were formed stereoselectively depending on C-3 substituent of P-lactam derivatives. (C) 2005 Published by Elsevier Ltd.