Synthesis of 5-Membered Sulfur Heterocycles via Tin-Catalyzed Annulation of Mercapto Ketones with Activated Alkenes
作者:Itaru Suzuki、Yuki Sakamoto、Yuta Seo、Yoriko Ninomaru、Kodai Tokuda、Ikuya Shibata
DOI:10.1021/acs.joc.9b03055
日期:2020.2.21
S-heterocycles was developed with Sn(Oct)2-2MeOH acting as a catalyst. Two types of products, dihydrothiophene 3 and thiolane 4, were obtained. The selectivity of the products was dependent on the reaction temperature and on the rearrangement of the S-heterocycles from 3 to 4 under heating conditions. The dihydrothiophenes 3 were transformed into useful thiolactones 6-8 and thiophene 9.
以Sn(Oct)2-2MeOH作为催化剂,开发了具有活化烯烃2的α-巯基酮1到S-杂环的有效转化方法。获得两种类型的产物,二氢噻吩3和噻吩4。产物的选择性取决于反应温度和在加热条件下S-杂环从3至4的重排。将二氢噻吩3转化为有用的噻内酯6-8和噻吩9。