Azetidine derivatives, their preparation and medicaments containing them
申请人:——
公开号:US20020035102A1
公开(公告)日:2002-03-21
The invention concerns compounds of formula (1) wherein: R represents a chain (A) or (B); R
1
is methyl or ethyl; R
2
is either an optionally substituted aromatic or an optionally substituted heteroaromatic ring; R
3
and R
4
, identical or different, are either an optionally substituted aromatic or an optionally substituted heteroaromatic ring; R′ represents a hydrogen atom or a —CO—alk radical, their optical isomers, their salts, their preparation and medicines containing them.
1
Chiral N-Heterocyclic Carbene−Copper(I)-Catalyzed Asymmetric Allylic Arylation of Aliphatic Allylic Bromides: Steric and Electronic Effects on γ-Selectivity
作者:Khalid B. Selim、Hirotsugu Nakanishi、Yasumasa Matsumoto、Yasutomo Yamamoto、Ken-ichi Yamada、Kiyoshi Tomioka
DOI:10.1021/jo102386s
日期:2011.3.4
sterically tuned to improve γ-selectivity in copper(I)-catalyzed asymmetric allylic arylation of aliphatic allylic bromides with several aryl Grignardreagents. High γ-selectivity was realized when either the aryl group of the Grignardreagent or the aryl group on the N-substituent of the carbene ligand was electron-deficient or when either the carbene ligand or allylic bromide was bulky. The results indicated
Acetindine derivatives, their preparation and medicaments containing them
申请人:——
公开号:US20030162808A1
公开(公告)日:2003-08-28
Disclosed are azetidine derivatives of formula:
1
their optical isomers, their salts, their preparation and medicaments containing them.
本发明涉及一种公开的式(1)的氮杂环丙烷衍生物,其光学异构体,其盐,其制备方法以及含有它们的药物。
Tricyclic compound, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US06417213B2
公开(公告)日:2002-07-09
A compound of the formula
wherein R1 is H or a substituent; m is 1-3; Ar is an aromatic group which may be substituted; X is a bond or a divalent straight-chain group having 1-6 atoms which may be substituted; Y is —S—, —O—, or —N(R2)— (R2 is H or a substituent group), Z is —N═ or —C(R3)═ (R3 is H or a hydrocarbon group), ring A is a benzene ring; ring B is a 5- to 7-membered ring which may be substituted, or a salt thereof is useful for eliciting a prostaglandin I2 receptor agonistic effect.