Cyclic (Alkyl)(amino)carbene Ligand-Promoted Nitro Deoxygenative Hydroboration with Chromium Catalysis: Scope, Mechanism, and Applications
作者:Lixing Zhao、Chenyang Hu、Xuefeng Cong、Gongda Deng、Liu Leo Liu、Meiming Luo、Xiaoming Zeng
DOI:10.1021/jacs.0c12318
日期:2021.1.27
Transition metal catalysis that utilizes N-heterocycliccarbenes as noninnocent ligands in promoting transformations has not been well studied. We report here a cyclic (alkyl)(amino)carbene (CAAC) ligand-promoted nitro deoxygenative hydroboration with cost-effective chromium catalysis. Using 1 mol % of CAAC-Cr precatalyst, the addition of HBpin to nitro scaffolds leads to deoxygenation, allowing for
BENZAZEPINE DERIVATIVE, PROCESS FOR PRODUCING THE SAME, AND USE
申请人:Takeda Chemical Industries, Ltd.
公开号:EP1422228A1
公开(公告)日:2004-05-26
The present invention provides a novel benzazepine derivative represented by formula :
wherein, R1 is a 5- or 6-membered aromatic ring, R2 is lower alkyl group, etc., Y is an optionally substituted imino group, ring A and ring B are independently an optionally substituted aromatic ring, W is formula -W1-X2-W2- (W1 and W2 are independently S(O)m1 (m1 is 0, 1 or 2), etc., and X2 is an optionally substituted alkylene groupetc. ), a preparation method and use thereof.
Centrally active N-substituted analogs of 3,4-methylenedioxyphenylisopropylamine (3,4-methylenedioxyamphetamine)
作者:Ulrich Braun、Alexander T. Shulgin、Gisela Braun
DOI:10.1002/jps.2600690220
日期:1980.2
The known central nervous system activity of 3,4-methylenedioxyphenylisopropylamine and its N-methyl homolog prompted the synthesis of a series of analogs with substituents on the nitrogen atom. Most of these analogs (R = alkyl, alkenyl, hydroxy, alkoxy, and alkoxyalkyl) were prepared by the reductive alkylation of 3,4-methylenedioxyphenylacetone with the appropriate amine and sodium cyanoborohydride
preferable for expression of potent analgesicactivity, and that the free carboxyl group is superior in its analgesicactivity to that of the esterified or amidated carboxy group at the C-terminal. In addition, N-methylation of the amide bond at the 4th position contributed to improved analgesicactivity. These results indicated that the strong and long-lasting analgesic effect of ADAMB is expressed by
Imidazole derivatives having an inhibitory activity for farnesyl transferase and process for preparation thereof
申请人:LG Chemical Ltd.
公开号:US06268363B1
公开(公告)日:2001-07-31
The present invention relates to a novel imidazole derivative represented by formula (1) which shows an inhibitory activity against farnesyl transferase or pharmaceutically acceptable salts or isomers thereof, in which A, n1 and Y are defined in the specification; to a process for preparation of the compound of formula (1); to intermediates which are used in the preparation of the compound of formula (1); and to a pharmaceutical composition comprising the compound of formula (1) as an active ingredient.