Chain-branched 1,3-dibenzylthioureas as vanilloid receptor 1 antagonists
摘要:
A series of chain-branched 1,3-dibenzylthiourea derivatives were synthesized, and tested their antagonist activity against vanilloid receptor 1. Chain-branching led to a significant change in the mode of action and the potency. (R)-Methyl or ethyl-branched 1,3-dibenzylthiourea derivatives showed the most potent antagonist activity up to the IC50 value of 0.05 muM which is 10-fold more potent than capsazepine. (C) 2004 Elsevier Ltd. All rights reserved.
Asymmetric Synthesis of Chiral Primary Amines by Ruthenium-Catalyzed Direct Reductive Amination of Alkyl Aryl Ketones with Ammonium Salts and Molecular H<sub>2</sub>
amination of simple ketones. The strategy makes use of ammonium acetate as the amine source and H2 as the reductant and is a user-friendly and operatively simple access to industrially relevant primary amines. Excellent enantiocontrol (>90% ee for most cases) was achieved with a wide range of alkylarylketones. The practicability of this methodology has been highlighted by scalable synthesis of key intermediates
Organocatalytic asymmetric biomimetic transamination of aromatic ketone to optically active amine
作者:Ying Xie、Hongjie Pan、Xiao Xiao、Songlei Li、Yian Shi
DOI:10.1039/c2ob26782a
日期:——
An asymmetric biomimetic transamination of aromatic ketones to opticallyactive amines with o-HOPhCH2NH2 as amine source catalyzed by hydroquinine-derived chiral base is described. Up to 85% ee was obtained.
[reaction: see text] The highly regioselective hydrogenolysis of bis(alpha-methylbenzyl)amine derivatives proceeded with influence not from the electronic effect but from the steric effect of the trifluoromethyl substituent on the aromatic ring to provide a practical asymmetric synthesis of trifluoromethyl-substituted alpha-phenylethylamines.
PREPARATION OF CHIRAL PRIMARY AMINE FROM ASYMMETRIC REDUCTIVE AMINATION OF SIMPLE KETONE CATALYZED BY RUTHENIUM-DIPHOSPHINE CATALYST
申请人:SHENZHEN CATALYS TECHNOLOGY CO., LTD
公开号:US20220017451A1
公开(公告)日:2022-01-20
The present invention relates to a preparation method of chiral primary amine. The chiral primary amine is prepared through a one-pot method that under the action of a ruthenium-chiral diphosphine catalyst, a simple ketone and an ammonium salt RCOONH
4
have reductive amination by adding hydrogen and then are heated and hydrolyzed by adding acid. The present invention has the advantages of good substrate universality, high reaction efficiency and the like