Stabilized zwitterionic derivatives from the reaction of 16-chloro-1-dehydrovincadifformine with sodium alkoxides
作者:Daniel Royer、Yang Liu Yu、Georgette Hugel、Jean Lévy
DOI:10.1016/s0040-4020(98)00293-2
日期:1998.6
Treatment of 16-chloro-1-dehydrovincadifformine 2a and 16-chloro-1-dehydrotabersonine 2b with sodium methoxide respectively yielded the 16-methoxyindolenines 11avs11b, and the two betaines 12avs12b and 14avs14b. Sodium ethoxide gave similar results, except for the absence of the 16-ethoxyindolenines. The structures of all derivatives were ascertained by their spectroscopic data, by chemical correlations