Synthesis of some new five membered heterocycles, a facile synthesis of oxazolidinones
作者:Ahmet Demirbas、Sule Ceylan、Neslihan Demirbas
DOI:10.1002/jhet.5570440608
日期:2007.11
The synthesis and structural properties of two kinds of thiosemicarbazide derivatives (2a-c and 3a-c) and one kind of semicarbazide derivatives (4a, 4b) have been described. These compounds were synthesized by treating 2-(4-amino-3-alkyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)acetohydrazides (1a-c) with benzyl isothiocyanate, 3-florophenyl isothiocyanate and benzylisocyanate, respectively. The synthesis
已经描述了两种硫代氨基脲衍生物(2a-c和3a-c)和一种氨基脲衍生物(4a,4b)的合成和结构性质。通过用苄基处理2-(4-氨基-3-烷基-5-氧代-4,5-二氢-1 H -1,2,4-三唑-1-基)乙酰肼(1a-c)合成这些化合物异硫氰酸酯,3-氟苯基异硫氰酸酯和苄基异氰酸酯。4-氨基-3-烷基-1-[(4-烷基-5-巯基(或5-氧代)-4 H -1,2,4-三唑-3-基)甲基] -4,5的合成-二氢-1 H -1,2,4-三唑-5-酮(5a-c,6a-c和7)是由与氢氧化钠的反应完成的。另一方面,对化合物2b,3b和4b进行酸性处理,得到了4-氨基-3-(4-氯苄基)-1-[(5-烷基氨基-1,3,4-噻唑(或1,3, 4-恶唑)-2-基)甲基] -4,5-二氢-1 H -1,2,4-三唑-5-酮(8、9和10)。硫代半(或半)氨基甲酰肼衍生物(2a-c,3c和4b)与4-氯苯并溴化物的缩合导致形成2-