The Reaction of 2,4,6-Triphenyl-1,3,5-thiadiazin-1-ium Salt with Active Methylene Compounds
作者:Isao Shibuya
DOI:10.1246/bcsj.55.2158
日期:1982.7
The reaction of 2,4,6-triphenyl-1,3,5-thiadiazin-1-ium tetrafluoroborate with several active methylene compounds was studied. Nitromethane and nitroethane gave 2H-1,3,5-thiadiazines. The compounds possessing a benzoyl group reacted with this salt to give 5-substituted 2,4,6-triphenylpyrimidines, while those possessing a carbamoyl group afforded 5-substituted 4-hydroxy-2,6-diphenylpyrimidines or 4(3H)-pyrimidinone
研究了 2,4,6-triphenyl-1,3,5-thiadiazin-1-ium 四氟硼酸盐与几种活性亚甲基化合物的反应。硝基甲烷和硝基乙烷得到 2H-1,3,5-噻二嗪。具有苯甲酰基的化合物与该盐反应生成 5-取代的 2,4,6-三苯基嘧啶,而具有氨基甲酰基的化合物生成 5-取代的 4-羟基-2,6-二苯基嘧啶或 4(3H)-嘧啶酮。另一方面,丙二腈和氰基乙酸乙酯生成 5-取代的 4-巯基-2,6-二苯基嘧啶,同时释放出苄腈。因此发现 2,4,6-triphenyl-1,3,5-thiadiazin-1-ium 四氟硼酸盐与活性亚甲基化合物以类似于 2,4,6-triphenyl-1,3-thiazin- 的方式反应1 鎓盐。