Ru(II)-catalyzed RCM reactions with electrophilic diene substrates
摘要:
Electrophilic dienes from alpha,beta-unsaturated ketones readily undergo the Ru(II)-benzylidene initiated RCM reaction. Cyclohexenone spirane formation was faster than cycloheptenone spirane formation. The products were pure stereoisomers. The products after hydrolysis were alpha,beta-unsaturated axo derivatives of cyclic alpha-amino acids. (C) 1998 Elsevier Science Ltd. All rights reserved.