Easy access to α-hydroxyimino-β-oxodithioesters and application towards the synthesis of diverse 1,4-thiazine-3-ones via reduction/annulation cascade
作者:Anugula Nagaraju、Gaurav Shukla、Abhijeet Srivastava、B. Janaki Ramulu、Girijesh Kumar Verma、Keshav Raghuvanshi、Maya Shankar Singh
DOI:10.1016/j.tet.2014.03.097
日期:2014.6
An operationally simple and facile synthesis of alpha-hydroxyimino-beta-oxodithioesters has been achieved by nitrosation of alpha-enolicdithioesters. They were further treated with internal alkynes to afford diverse 1,4-thiazin-3-ones via domino reduction/annulation strategy under mild reaction conditions. Importantly, this is the first straightforward entry to highly functionalized 1,4-thiazin-3-one derivatives from simple starting materials. (C) 2014 Elsevier Ltd. All rights reserved.