作者:Anugula Nagaraju、K. Sandeep、K.C. Kumara Swamy
DOI:10.1016/j.tetlet.2018.05.004
日期:2018.6
straightforward synthesis of diverse oxazoles from oximes possessing a vicinal carbonyl group has been achieved by treatment of the latter with terminal diazo compounds like ethyl/benzyl diazoacetate and diazoacetophenone (which act as carbenoids) in one pot. At least two reducible functional groups (two ester groups or cyano + ester) are simultaneously introduced in one step. This reaction involves expulsion
通过在一个锅中用末端重氮化合物如乙基/重氮乙酸苄基酯和重氮苯乙酮(充当类胡萝卜素)处理后者,已经实现了从具有邻位羰基的肟中操作上简单,经济,直接地合成各种恶唑的方法。在一个步骤中同时引入至少两个可还原的官能团(两个酯基或氰基+酯)。该反应涉及在铜催化下将仅作为副产物的N 2和水各自的分子排出。这些恶唑之一的结构通过X射线晶体学确认。通过使用NaBH 4 / EtOH,可以将恶唑产物中的两个酯基还原为醇部分。