Isothiocyanate 6, obtained from vinyliminophosphorane 4 with CS2, reacted with various aliphatic primary amines to afford directly the 1,4,5-trisubstituted imidazolidine-2-thiones 5. However, the reaction of isothiocyanate 6 with aliphatic secondary amines provided 2,4,5-trisubstituted thiazoles 10 in good yields.
由
乙烯基亚
氨基
磷烷4与CS 2制备的异
硫氰酸酯6与各种脂肪族
伯胺反应,直接得到1,4,5-三取代的
咪唑烷-2-
硫酮5。然而,异
硫氰酸酯6与脂族仲胺的反应以良好的产率提供了2,4,5-三取代的
噻唑10。