Rhodium-Catalyzed 1,1-Hydroacylation of Thioacyl Carbenes with Alkynyl Aldehydes and Subsequent Cyclization
作者:Bingnan Zhou、Qiuyue Wu、Ziyang Dong、Jiaxi Xu、Zhanhui Yang
DOI:10.1021/acs.orglett.9b01003
日期:2019.5.17
A rhodium-catalyzed 1,1-hydroacylation of thioacyl carbenes with alkynyl and alkenyl aldehydes and subsequent 6-endo-trig/dig cyclization are realized, giving structurally diverse 4H-thiopyran-4-ones and 2,3-dihydro-4H-thiopyran-4-ones in moderate to good yields. The oxidative addition of Rh(I) to aldehydes is proposed to be the turnover-limiting step. Manipulations of estrones demonstrate the applications
实现了铑的羰基羰基与炔基和烯基醛催化的1,1-氢羰基化反应,随后进行了6-内-trig / dig环化反应,得到了结构上不同的4 H - thiopyran -4-ones和2,3-dihydro-4 H -thiopyran-4-ones,产量中等至良好。提出将Rh(I)氧化成醛是限制营业额的步骤。雌酮的操作证明了我们正式的(3 + 3)转环剂在天然产物的结构修饰中的应用。