A one-step synthesis towards new ligands based on aryl-functionalised thiazolo[5,4-d]thiazole chromophores
作者:Richard C. Knighton、Andrew J. Hallett、Benson M. Kariuki、Simon J.A. Pope
DOI:10.1016/j.tetlet.2010.07.172
日期:2010.10
of disubstituted thiazolo[5,4-d]thiazoles was achieved by condensing two equivalents of an aryl aldehyde with dithiooxamide in nitrobenzene at 130 °C for 24 h. The method is tolerant to a range of aromatic aldehydes including derivatives of pyridine, quinoline, mono- and dihydroxybenzene. An X-ray crystal structure of 2,5-bis(2-hydroxy-3,5-di-tert-butylphenyl)thiazolo[5,4-d]thiazole was obtained confirming
通过将两当量的芳基醛与二硫代草酰胺在硝基苯中在130°C下冷凝24小时,可以实现二取代的噻唑并[5,4- d ]噻唑的一般合成。该方法可耐受多种芳族醛,包括吡啶,喹啉,单和二羟基苯的衍生物。获得了2,5-双(2-羟基-3,5-二叔丁基苯基)噻唑并[5,4- d ]噻唑的X射线晶体结构,证实了所建议的配方,同时还提供了支持光谱数据的建议。对于2-羟基苯基衍生物,分子内氢键以溶液和固态存在。