Reaction of Benzylidene Chlorides with О-Methyl Diethylphosphinothioate
摘要:
O-Methyl diethylphosphinothioate reacts with benzylidene chlorides to form arenecarbthioaldehyde trimers and diethylphosphinoyl chloride. This result suggests that the reaction involves initial attack of the thione sulfur atom of the phosphinothioyl group on the methine carbon atom of the gem-dichloride.
2,4,6-Triaryl-dihydro-1,3,5-dithiazines reacted with electrophilicreagents such as p-TsOH·H2O, CF3COOH, HCl, and BF3·OEt2 under reflux in CH3CN to afford α-2,4,6-triaryl-1,3,5-trithianes and β-isomers (3a-d) in good yields. Reactions with I2 gave selectively 3a-d in high yields, while with ICl or IBr gave 3a-d and p-substituted benzylideneamine·HY.