Site-Selective Intermolecular Oxidative C-3 Alkenylation of 7-Azaindoles at Room Temperature
作者:Prakash Kannaboina、K. Anil Kumar、Parthasarathi Das
DOI:10.1021/acs.orglett.5b03429
日期:2016.3.4
palladium-catalyzed C-3 selective alkenylation of 7-azaindoles, performed in the presence of Pd(OAc)2 as the catalyst, PPh3 as the ligand, Cu(OTf)2 as an oxidative cocatalyst, and molecular oxygen (O2) as the terminal oxidant at room temperature, has been reported. This direct alkenylation strategy offers a new approach in functionalizing pharmaceutically important 7-azaindoles.
Synthesis of <i>meta</i>-(Indol-3-yl)phenols from Indoles and Cyclohexenone via Palladium(II)-Catalyzed Oxidative Heck Reaction and Dehydrogenative Aromatization in a One-Step Sequence
作者:Seung Hwan Son、Jeong-Won Shin、Hyuck-Jae Won、Hyung-Seok Yoo、Yang Yil Cho、Soo Lim Kim、Yoon Hu Jang、Boyoung Y. Park、Nam-Jung Kim
DOI:10.1021/acs.orglett.1c02679
日期:2021.10.1
with a wide substrate scope (a total of 25 compounds) via a palladium(II)-catalyzed oxidative Heckreaction and dehydrogenative aromatization in a one-step sequence is reported. This methodology affords a novel route for the privileged structures that are challenging to access via a direct link between indole and phenol, in a highly efficient and atom-economical manner.
据报道,通过钯 (II) 催化的氧化 Heck 反应和脱氢芳构化以一步顺序轻松构建具有广泛底物范围(总共 25 种化合物)的间-(吲哚-3-基)苯酚骨架。这种方法为通过吲哚和苯酚之间的直接链接以高效和原子经济的方式难以访问的特权结构提供了一种新途径。
Iridium-catalyzed C3-selective asymmetric allylation of 7-azaindoles with secondary allylic alcohols
biological activities and physical properties. We report the first example of the iridium-catalyzed C3-selective asymmetric allylation of 7-azaindoles with racemic secondary allylic alcohols to give only branched allylation products in good to high yields with high enantioselectivity (up to >99.5% ee). Allylic alcohols and 7-azaindoles with a variety of functional groups including halogen and heteroaromatic
Three-Component Synthesis of Ynediones by a Glyoxylation/Stephens-Castro Coupling Sequence
作者:Eugen Merkul、Janis Dohe、Charlotte Gers、Frank Rominger、Thomas J. J. Müller
DOI:10.1002/anie.201007194
日期:2011.3.21
two steps forward! Starting from diverse heterocycles, the title reaction furnishes ynediones under very mild conditions in a direct and preparatively simple one‐pot process. The key to avoiding decarbonylation is the CuI‐catalyzed Stephens–Castro alkynylation rather than the usually more efficient Sonogashira coupling. In addition, novel highly atom‐economical four‐component syntheses of various heterocycles
Palladium-catalyzed aminocarbonylation of halo-substituted 7-azaindoles and other heteroarenes using chloroform as a carbon monoxide source
作者:Prakash Kannaboina、Gaurav Raina、K. Anil Kumar、Parthasarathi Das
DOI:10.1039/c7cc04339b
日期:——
A palladium-catalyzed aminocarbonylation of halo-substituted 7-azaindoles utilizing CHCl3 as the carbonyl source has been developed for the straightforward incorporation of an amide functional group. The protocol was extended to other heteroarenes such as pyrazolopyridines and indazoles. The substrate scope of the reaction with respect to heteroarenes and the amine component is reported. This method