以1摩尔%CuCl 2 ·2H 2 O为催化剂,方便地合成苯并[4,5]噻唑并[2,3- c ] [1,2,4]三唑
摘要:
通过串联分子间C–N键和分子内CS键形成序列,开发了一种便捷高效的合成苯并[4,5]噻唑并[2,3- c ] [1,2,4]三唑的方法由邻-溴-芳基异硫氰酸酯和芳酰肼得到。以1 mol%CuCl 2 ·2H 2 O / 1 mol%1,10-菲咯啉提供了一系列优异的总收率的一系列苯并[4,5]噻唑并[2,3- c ] [1,2,4]三唑作为催化剂,水作为溶剂。
efficient synthesis of some 1,4-disubstituted thiosemicarbazide derivatives is described. The reaction of 3-chlorobenzoic acid hydrazide with various aryl isothiocyanates gave thiosemicarbazide derivatives (1–11) in good yield. The cyclization of compounds (1–11) in the presence of 2% NaOH resulted in the formation of compounds (12–22) containing the 1,2,4-triazole ring. A series of newMannichbases (23–33)