Process for preparing substituted pyridines via 1-aza-1,3-butadienes and intermediates 1-aza-1,3-butadiene.

摘要

PROCESS FOR THE PREPARATION OF ALLOWING pyridines 1-AZA-1,3-BUTADIENES REACT, in the presence of catalytic QUANTITY AND SECONDARY AMINA acid with an aldehyde or ketone and 1-AZA-NEW 1.3-BUTADIENES They USED IN THIS PROCESS. Pyridines SUCH MAY BE OBTAINED WITH A HIGH PERFORMANCE IN A SIMPLE PROCESS WITH A SHORT PERIOD OF REACTION. 1ST-AZA-1,3-butadiene can, if desired, be prepared in situ from an imine and an aldehyde.