Catalytic Asymmetric Hydrogenation of N-Boc-Imidazoles and Oxazoles
摘要:
Substituted imidazoles and oxazoles were respectively hydrogenated into the corresponding chiral imidazolines and oxazolines (up to 99% ee). The highly enantioselective hydrogenation was achieved by using the chiral ruthenium catalyst, which is generated from Ru(eta(3)-methallyl)(2)(cod) and a trans-chelating chiral bisphosphine ligand, PhTRAP. This is the first successful catalytic asymmetric reduction of 5-membered aromatic rings containing two or more heteroatoms.
Catalytic Asymmetric Hydrogenation of N-Boc-Imidazoles and Oxazoles
摘要:
Substituted imidazoles and oxazoles were respectively hydrogenated into the corresponding chiral imidazolines and oxazolines (up to 99% ee). The highly enantioselective hydrogenation was achieved by using the chiral ruthenium catalyst, which is generated from Ru(eta(3)-methallyl)(2)(cod) and a trans-chelating chiral bisphosphine ligand, PhTRAP. This is the first successful catalytic asymmetric reduction of 5-membered aromatic rings containing two or more heteroatoms.
Heteroaryl-Pyrazole Derivatives as Cannabinoid CB1 Receptor Antagonists
申请人:LEE Jinhwa
公开号:US20080081812A1
公开(公告)日:2008-04-03
A heteroaryl-pyrazole compound of formula (I) or a pharmaceutically acceptable salt thereof is effective as a cannabinoid CB
1
receptor inverse agonist or antagonist, which is useful for preventing or treating obesity and obesity-related metabolic disorders. The present invention also provides a method for preparing the inventive heteroaryl-pyrasole compounds or a pharmaceutically acceptable salt thereof, a pharmaceutical composition containing same, and a method for preventing or treating obesity and obesity-related metabolic disorders.
Novel substituted pyrazolo[4,3-e]diazepines, pharmaceutical compositions containing them, use as medicinal products and processes for preparing them
申请人:——
公开号:US20030171364A1
公开(公告)日:2003-09-11
The invention relates to novel substituted pyrazolo[4,3-e]-diazepines of general formula (I), to pharmaceutical compositions containing them, to their use as medicinal products and to processes for preparing them.
Kinetic Resolution of 2‐
<i>N</i>
‐Acylamido Tertiary Allylic Alcohols: Asymmetric Synthesis of Oxazolines
作者:Yongkai Pan、Qianwen Jiang、Subramani Rajkumar、Chaofan Zhu、Jinglei Xie、Shaoze Yu、Yunrong Chen、Yu‐Peng He、Xiaoyu Yang
DOI:10.1002/adsc.202001051
日期:2021.1.5
series of cyclohexyl‐fused SPINOL‐derived phosphoricacids (Cy‐SPA) have been developed to catalyze the kinetic resolution of 2‐N‐acylamido tertiary allylic alcohols, providing access to chiral oxazolines bearing C‐2 alkyl substituents with high enantioselectivities (with s‐factors up to 153). Gram‐scale reaction with 1 mol% catalyst loading and transformations of the chiral products demonstrates the
continuous-flow protocol for the synthesis of the privileged structure 3,4-dihydro-5H-benzo[e][1,4]diazepin-5-one is reported. If compared to the traditional metal mediated non-catalytic reduction procedure, this approach is high yielding and does not require purification steps and therefore could be conveniently used for the generation of compound libraries for drugdiscovery.
报道了一种有效的和克级的连续流协议,用于合成特权结构3,4-dihydro-5 H-苯并[ e ] [1,4]二氮杂-5-5-酮。如果与传统的金属介导的非催化还原程序相比,该方法产率高且不需要纯化步骤,因此可以方便地用于生成用于药物发现的化合物库。
Novel substituted pyrazolo[4,3-e]diazepines, pharmaceutical compositions containing them, use as medical products and processes for preparing them
申请人:Burnouf Catherine
公开号:US20050130957A1
公开(公告)日:2005-06-16
The invention relates to novel substituted pyrazolo[4,3-e]-diazepines of general formula:
to pharmaceutical compositions containing them, to their use as medicinal products and to processes for preparing them.