Tridentate Nickel(II)-Catalyzed Chemodivergent C–H Functionalization and Cyclopropanation: Regioselective and Diastereoselective Access to Substituted Aromatic Heterocycles
作者:Ekta Nag、Sai Manoj N. V. T. Gorantla、Selvakumar Arumugam、Aditya Kulkarni、Kartik Chandra Mondal、Sudipta Roy
DOI:10.1021/acs.orglett.0c02138
日期:2020.8.21
Schiff-base nickel(II)-phosphene-catalyzed chemodivergent C–H functionalization and cyclopropanation of aromatic heterocycles is reported in moderate to excellent yields and very good regioselectivity and diastereoselectivity. The weak, noncovalent interaction between the phosphene ligand and Ni center facilitates the ligand dissociation, generating the electronically and coordinativelyunsaturated active
and carbonmonoxide gas-free palladium-catalyzed aminocarbonylation of indole has been developed for the synthesis of N-benzoylindoles. This method uses Mo(CO)6 as a convenient CO-precursor and BuPAd2 as the ligand. A number of substituents on the aryl bromide species is tolerated under the presented conditions and gave the desired products in up to excellent yields. A mild and carbonmonoxide gas-free
Highly Efficient Aminocarbonylation of Iodoarenes at Atmospheric Pressure Catalyzed by a Robust Acenaphthoimidazolyidene Allylic Palladium Complex
作者:Weiwei Fang、Qinyue Deng、Mizhi Xu、Tao Tu
DOI:10.1021/ol401550h
日期:2013.7.19
A robust allylic palladium-NHC complex was developed and exhibited extremely high catalytic activity toward aminocarbonylation of various (hetero)aryl iodides under atmospheric carbon monoxide pressure, in which a broad range of secondary and primary amines were well tolerated. In addition, the concise synthesis of an anticancer drug tamibarotene was accomplished even in a gram scale, further highlighting the practical applicability of the protocol.
Scaffold hopping by net photochemical carbon deletion of azaarenes
作者:Jisoo Woo、Alec H. Christian、Samantha A. Burgess、Yuan Jiang、Umar Faruk Mansoor、Mark D. Levin
DOI:10.1126/science.abo4282
日期:2022.4.29
Discovery chemists routinely identify purpose-tailored molecules through an iterative structural optimization approach, but the preparation of each successive candidate in a compound series can rarely be conducted in a manner matching their thought process. This is because many of the necessary chemical transformations required to modify compound cores in a straightforward fashion are not applicable
Visible‐Light‐Enabled Multicomponent Cascade Transformation from Indoles to 2‐Azidoindolin‐3‐yl 2‐Aminobenzoates
作者:Ling‐Ling Zhang、Meng‐Meng Xu、Wen‐Bin Cao、Xiao‐Ping Xu、Shun‐Jun Ji
DOI:10.1002/adsc.202000637
日期:2020.8.4
The synthesis of 2‐azido‐1‐benzoylindolin‐3‐yl2‐benzamidobenzoate commencing from (1H‐indol‐1‐yl)(phenyl)methanone and trimethylsilyl azide (TMSN3) under oxygen atmosphere is described in this paper. This transformation proceeds via a sequential dearomatization and ring‐opening cascade reaction of indoles in a cascade manner.