Reactions of Substituted Oxazoles and Thiazoles with Acid Chlorides: Carbon-Carbon Bond Formation through Cyclic Ketene Acetals
作者:Charles Pittman、Sabornie Chatterjee、Guozhong Ye、Yingquan Song、Bobby Barker
DOI:10.1055/s-0030-1258224
日期:2010.10
Reactions of 2,4,5-trimethyloxazole, 2,4,5-trimethylthiazole, 2-methylthiazole, and 2-ethyl-4,5-dimethylthiazole with different acid chlorides in the presence of different bases were explored. Arylvinyl esters of substituted benzoic acids containing substituted oxazoles or thiazoles were formed when aroyl chlorides were used. Degrees of aroylation were different with different bases. Reactions with
在不同的碱存在下,研究了2,4,5-三甲基恶唑,2,4,5-三甲基噻唑,2-甲基噻唑和2-乙基-4,5-二甲基噻唑与不同的酰氯的反应。当使用芳酰氯时,形成了含有取代的恶唑或噻唑的取代的苯甲酸的芳基乙烯基酯。芳香化程度因碱而异。还探索了与烷基酰氯的反应。这些反应大多数是通过环状乙烯酮缩醛中间体发生的。 碳-碳键形成-恶唑-噻唑-乙烯基酯-原位生成的环状乙烯酮缩醛