Heterocycles in organic synthesis. Part 13. The reaction of 2,4-diphenyithiopyrylium perchlorate with amines
Abstract
The title cation abstracts hydride from aliphatic amines yielding the corresponding thiopyran: with methylamine some pyridinium cation is also found. With aniline, and its N- and ring-substituted and hetero-analogues, fair yields of novel thiopyrylium dyes are obtained.