Iridium‐Catalyzed Annulation Reactions of Thiophenes with Carboxylic Acids: Direct Evidence for a Heck‐type Pathway
作者:Guangying Tan、Qiulin You、Jingbo Lan、Jingsong You
DOI:10.1002/anie.201802539
日期:2018.5.22
The functionalization of thiophenes is a fundamental and important reaction. Herein, we disclose iridium‐catalyzed one‐pot annulation reactions of (benzo)thiophenes with (hetero)aromatic or α,β‐unsaturated carboxylic acids, which afford thiophene‐fused coumarin‐type frameworks. Dearomatization reactions of 2‐substituted thiophenes with α,β‐unsaturated carboxylic acids deliver various thiophene‐containing
Zinc-Mediated Decarboxylative Alkylation of <i>Gem</i>-difluoroalkenes
作者:Liting Yu、Mei-Lin Tang、Chang-Mei Si、Zhi Meng、Yongxi Liang、Jilai Han、Xun Sun
DOI:10.1021/acs.orglett.8b01866
日期:2018.8.3
An efficient and mild zinc-mediated decarboxylative alkylation of gem-difluoroalkenes with N-hydroxyphthalimide (NHP) esters, to give monofluoroalkenes in moderate to excellent yields with high Z-selectivity is reported. The reaction tolerates a broad range of functional groups and can be easily scaled up, which thus may pave the way for its further applications in medicinal chemistry and materials