3-aryl-4-alkylthio-5-aryl- or -alkyl-2,3-dihydro-1,3-thiazoles 10 have been prepared starting from mesoionic 5-alkyl- or 5-aryl-2-piperidino-1,3-thiazole-4-thiolates 6. After alkylation of the mesoionic compound, the best conditions to isolate these two dihydrothiazoles were established from a mechanistic study of the reduction. Compound 8 is known to give dithiadiazafulvalenes through its thiazolium tetrafluoroborate
取决于实验条件,是2-
哌啶子基-3-芳基-4-烷基
硫代5-芳基-或-烷基-2,3-二氢-1,3-
噻唑8或2-未取代的3-芳基-4从中离子的5-烷基-或5-芳基-2-
哌啶子基-1,3-
噻唑-4-开始制备了-烷
硫基-5-芳基-或-烷基-2,3-二氢-1,3-
噻唑10。
硫醇盐6。对中离子化合物进行烷基化后,从还原反应的机理研究中确定了分离这两种二氢
噻唑的最佳条件。已知化合物8通过其
噻唑鎓四
氟硼酸盐得到二噻二氮富瓦烯。我们在这里表明,这些盐也可以从10获得。