Prof. Dr. Rudolf Gompper and Dipl.-Chem. Rainer Sobotta
Vinamidinium salts like (1) are prototypes of salts of acceptor-substituted allyl cations (A = CO2Et, CO2Me, COPh, etc., R1= H, Me, Ph, CO2Me, etc., R2 =H, Me, Ph, CI, NMe2). These compounds are now readily accessible. In keeping with the charge distribution, they react preferentially at C-3.