Homo- and Heteroannulation of sp<sup>3</sup> C–H Bonds in Acetophenones for Divergent Synthesis of Thienothiazoles
作者:Phuc H. Pham、Khang X. Nguyen、Hoai T. B. Pham、Tung T. Nguyen、Nam T. S. Phan
DOI:10.1021/acs.orglett.9b03414
日期:2019.11.1
2-d]thiazoles via direct functionalization of C(sp3)–H bonds in acetophenones was reported. The transformation is divergent to afford either 2-phenylbenzo[4,5]thieno[3,2-d]thiazoles or benzo[4,5]thieno[3,2-d]thiazol-2-yl(phenyl)methanones. Cross-coupling of acetophenones with C–H bonds in phenylacetic acids, methylazaarenes, and aldehydes was also feasible. Excellent tolerance of functionalities was observed.
通过苯乙酮中的C(sp 3)-H键直接官能化合成了稠合噻吩并[3,2- d ]噻唑。该转化是不同的,以提供2-苯基苯并[4,5]噻吩并[3,2- d ]噻唑或苯并[4,5]噻吩并[3,2 - d ]噻唑-2-基(苯基)甲烷。在苯乙酸,甲基氮杂芳烃和醛中,苯乙酮与C–H键的交叉偶联也是可行的。观察到对功能的极好的耐受性。我们的方法标志着苯乙酮中C(sp 3)–H键的罕见功能化是在没有预先官能化肟酯的情况下获得杂环。