Arylethanolamines derived from salicylamide with .alpha.- and .beta.-adrenoceptor blocking activities. Preparation of labetalol, its enantiomers and related salicylamides
作者:James E. Clifton、Ian Collins、Peter Hallett、David Hartley、Lawrence H. C. Lunts、Philip D. Wicks
DOI:10.1021/jm00348a013
日期:1982.6
A series of phenethanolamines (3) based on salicylamide has been prepared and shown to possess beta-adrenergic blocking properties. When the basic nitrogen atom was substituted by some aralkyl groups, the compounds also blocked alpha-adrenoceptors. The 1-methyl-3-phenylpropyl derivative labetalol (34) is antihypertensive in animals and man, and syntheses of its four stereoisomers are described. The
Oxidative Cleavage of the CarbonCarbon σ-Bond Using Reusable Copper on Iron
作者:Ren-Jie Song、Yu Liu、Rui-Xiang Hu、Yan-Yun Liu、Ji-Cheng Wu、Xu-Heng Yang、Jin-Heng Li
DOI:10.1002/adsc.201100225
日期:2011.6
An efficient and resuble copper on iron catalyst has been prepared for the cleavage of the carbon‐carbon σ‐bond in α‐aminocarbonyl compounds leading to the corresponding formylamides and acids with a maximal TON of up to 51,000. It is noteworthy that the copper on iron catalyst can be easily separated from the reaction mixture, and retains its activity after several reuses.
Palladium-Catalyzed Synthesis of 3-Acylated Indoles Involving Oxidative Cross-Coupling of Indoles with α-Amino Carbonyl Compounds
作者:Ri-Yuan Tang、Xiao-Kang Guo、Jian-Nan Xiang、Jin-Heng Li
DOI:10.1021/jo402215s
日期:2013.11.15
selective C–N bond oxidative cleavage method to 3-acylated indoles by Pd-catalyzed oxidative cross coupling of indoles with α-aminocarbonylcompounds has been developed; moreover, one-pot synthesis of 3-acylated indoles from 2-ethynylanilines and α-aminocarbonylcompounds has also been established. Importantly, the products 3-acylated indoles can be used to construct polyheterocyclic compound, which can
Process for preparing optically active secondary alcohols having nitrogenous or oxygenic functional groups
申请人:——
公开号:US20030045727A1
公开(公告)日:2003-03-06
A process for preparing optically active secondary alcohols of the general formula (3), [wherein R
1
is linear lower alkyl, an aromatic ring group, or the like; A is CH
2
NR
2
R
3
or the like; n is an integer of 0 to 2; and * represents an asymmetric carbon atom] by asymmetrically hydrogenating a ketone compound of the general formula (1) having nitrogenous or oxygen functional group at any of the a-, &bgr;- and &ggr;-positions, with selectivity among functional groups by the use of a ruthenium/optically active bidentate phosphine/diamine complex as the catalyst in the presence of hydrogen alone or together with a base. The optically active secondary alcohols obtained by the process are useful as drugs and intermediates for the preparation of drugs.
Direct hydroxyethylation of amines by carbohydrates <i>via</i> ruthenium catalysis
作者:Le Jia、Mohamed Makha、Chen-Xia Du、Zheng-Jun Quan、Xi-Cun Wang、Yuehui Li
DOI:10.1039/c9gc01195a
日期:——
efficient and halogen-free catalytic methodology for the synthesis of β-aminoalcoholsfrom aromatic amines and biomass-derived carbohydrates is demonstrated for the first time. The activation of C5/C6 sugars by a ruthenium catalyst selectively generates the C2 alkylating reagent glycolaldehyde. The transformation involves metal-catalyzed hydrogenborrowing for the reduction of the imine intermediate. A series