Mechanistic Investigations on the Interaction of Morita–Baylis–Hillman Ketones with 2-Aminothiophenol
作者:Rajkiran Kumari、Ajit Kumar Jha、Akram Gulam Hussain Khan、Srinivasan Easwar
DOI:10.1021/acs.joc.3c02993
日期:——
of Morita–Baylis–Hillman ketones with 2-aminothiophenol mediated by Cs2CO3 results in an oxidative cyclization to 2,2-disubstituted dihydro-1,4-benzothiazines, with the structure of the product indicating the occurrence of an aza-Michael addition along the pathway. In contrast, in the absence of a base, the parent compounds interact to produce a thia-Michael adduct instead. A deeper mechanistic study
Morita-Baylis-Hillman 酮与 2-氨基苯硫酚在 Cs 2 CO 3介导下的反应导致氧化环化为 2,2-二取代的二氢-1,4-苯并噻嗪,产物的结构表明氮杂的发生-迈克尔沿着路径添加。相反,在不存在碱的情况下,母体化合物相互作用产生硫杂-迈克尔加合物。更深入的机制研究提高了我们对明显矛盾的理解,并提供了对反应性依赖于碱基的转换的见解。