Construction of three types of fused isoindoles via furan-pyrrole ring exchange reaction
作者:Mase Lee、Hiroyuki Moritomo、Ken Kanematsu
DOI:10.1016/0040-4020(96)00386-9
日期:1996.6
The new synthetic route of threetypes of fusedisoindoles using furan-pyrroleringexchangereaction as the main synthetic strategy is presented. Benzoisoindoles 17, 28 and 38 were synthesised from bicyclic furans 14, 25 and 35 respectively, which were trapped with dimethyl acetylenedicarboxylate.
Synthesis of enantiomerically pure amino-substituted fused bicyclic rings
申请人:——
公开号:US20030114679A1
公开(公告)日:2003-06-19
This invention describes various processes for synthesis and resolution of racemic amino-substituted fused bicyclic ring systems. One process utilizes selective hydrogenation of an amino-substituted fused bicyclic aromatic ring system. An alternative process prepares the racemic amino-substituted fused bicyclic ring system via nitrosation. In addition, the present invention describes the enzymatic resolution of a racemic mixture to produce the (R)- and (S)-forms of amino-substituted fused bicyclic rings as well as a racemization process to recycle the unpreferred enantioner. Further provided by this invention is an asymmetric synthesis of the (R)- or (S)-enantiomer of primary amino-substituted fused bicyclic ring systems.
A compound as a CXCR2 antagonist and an application thereof in preparing a drug as a CXCR2 antagonist. In particular, the present invention relates to a compound represented by formula (II) or an isomer or pharmaceutically acceptable salt thereof.
A compound as a CXCR2 antagonist and an application thereof in preparing a drug as a CXCR2 antagonist. In particular, the present invention relates to a compound represented by formula (II) or an isomer or pharmaceutically acceptable salt thereof.
Enzymatic Resolution of Bicyclic 1-Heteroarylamines Using <i>Candida antarctica</i> Lipase B
作者:Krystyna A. Skupinska、Ernest J. McEachern、Ian R. Baird、Renato T. Skerlj、Gary J. Bridger
DOI:10.1021/jo026701r
日期:2003.5.1
Candida antarctica lipase B has been used to kinetically resolve a structurally diverse series of bicyclic 1-heteroaryl primary amines by enantioselective acetylation. High yields of either enantiomer could be obtained with excellent enantioselectivity (90-99% ee), while the undesired enantiomer could, in some cases be recycled by thermal racemization. The absolute stereochemistry of the products was confirmed by an X-ray crystal structure.