Synthesis of 6-bromo-2-arylindoles using 2-iodobenzoic acid as precursor
摘要:
The synthesis of 6-bromo-2-arylindoles starting from readily available 2-iodobenzoic acid is presented. Regioselective bromination of the latter was followed by Curtius rearrangement and trapping of the isocyanate with benzyl alcohol led to the benzyl carbamate of 2-iodo-5-bromoaniline. Chemoselective Sonogashira coupling of this compound with arylacetylenes followed by TBAF induced 5-endo-dig cyclization gave the desired bromo indoles. The method allows selective introduction of a bromine atom at the indole C-6 position. (C) 2011 Elsevier Ltd. All rights reserved.
This report describes a palladium-catalyzed dearomatization and amination tandem reaction of 2,3-disubstituted indoles and benzofurans via the Catellani strategy. This reaction provides a new method for the construction of amino-substituted indoline-fused cyclic and benzofuran spiro compounds in good yields. The reaction has broad functional group compatibility and substrate scope.
N-Substituted 2-iodobenzamides and enaminones undergo cascade transformations to achieve quinazolinones via a copper-catalyzed Ullmann-type coupling, a Michael addition and a retro-Mannich reaction. A unique stereochemical feature of this domino process was that Z-enaminones reacted without external ligands, whereas E-enaminones required the assistance of ligands.
The copper-catalyzed multicomponentreaction of 2-iodobenzamides, NaN3 and terminal alkynes for the synthesis of 2-(1,2,3,-triazolyl)benzamide derivatives was achieved in a one-step process and short period of time under mild reaction condition. The transformations consisted of C(aryl)-N bond formation and azide-alkyne cycloadditon. The absence of an external base was found to be crucial in determining
ISOINDOLIN-1-ONE DERIVATIVES USEFUL AS GRK2 INHIBITORS
申请人:Janssen Pharmaceutica NV
公开号:US20220009906A1
公开(公告)日:2022-01-13
The present invention is directed to isoindolin-1-one derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders and conditions modulated by GRK2, including, but not limited to, cardiac failure, cardiac hypertrophy, hypertension, Type II diabetes Mellitus, NASH, NAFLD, end stage chronic kidney disease, kidney failure, etc.
Tunable Synthesis of 3-Hydroxylisoquinolin-1,4-dione and Isoquinolin-1-one Enabled by Copper-Catalyzed Radical 6-<i>endo</i> Aza-cyclization of 2-Alkynylbenzamide
In this work, switchable synthesis of isoquinolin-1-one and 3-hydroxylisoquinolin-1,4-dione from 2-alkynylbenzamide is reported. The transformation works well with good yields and a broad reaction scope. The synthetic switch for providing isoquinolin-1-one and 3-hydroxylisoquinolin-1,4-dione is enabled by the use of a N2 or O2 atmosphere. Mechanism studies show that the reaction proceeds in a regioselective