通过在温和的条件下通过铜催化的磷化磷与烯基硼酸的氧化偶联反应,开发了一种可调谐策略,以高至极好的收率制备α,β-不饱和酯和α,β-不饱和γ-酮酯。不加水的反应得到α,β-不饱和酯,酮和酰胺,而α,β-不饱和γ-酮酯,1,4-α,β-不饱和二酮和α,β-不饱和γ-酮酰胺是使用5.0当量时获得。水。高2 O 18标记实验表明,水在α,β-不饱和γ-酮酸酯的形成中起着重要作用。在机理研究的基础上,提出了α,β-不饱和酯和α,β-不饱和γ-酮酯的合理形成机理。salts盐也可以代替磷化磷化物直接用作偶联伴侣。该反应表现出广泛的底物范围,良好的官能团耐受性,良好的区域选择性和多种偶联产物。
[EN] SULFUR COMPOUNDS AS INHIBITORS OF HEPATITIS C VIRUS NS3 SERINE PROTEASE<br/>[FR] COMPOSES SOUFRES EN TANT QU'INHIBITEURS DE LA PROTEASE SERINE NS3 DU VIRUS DE L'HEPATITE C
申请人:SCHERING CORP
公开号:WO2005087731A1
公开(公告)日:2005-09-22
The present invention discloses novel compounds which have HCV protease inhibitory activity as well as methods for preparing such compounds. In another embodiment, the invention discloses pharmaceutical compositions comprising such compounds as well as methods of using them to treat disorders associated with the HCV protease.
[EN] CYCLOBUTENEDIONE GROUPS-CONTAINING COMPOUNDS AS INHIBITORS OF HEPATITIS C VIRUS NS3 SERINE PROTEASE<br/>[FR] GROUPES CYCLOBUTENEDIONE CONTENANT DES COMPOSES SERVANT D'INHIBITEURS A LA SERINE PROTEASE NS3 DU VIRUS DE L'HEPATITE C
申请人:SCHERING CORP
公开号:WO2005085197A1
公开(公告)日:2005-09-15
The present invention discloses novel compounds which have HCV protease inhibitory activity as well as methods for preparing such compounds. In another embodiment, the invention discloses pharmaceutical compositions comprising such compounds as well as methods of using them to treat disorders associated with the HCV protease.
NHC-Catalyzed Aldol-Like Reactions of Allenoates with Isatins: Regiospecific Syntheses of γ-Functionalized Allenoates
作者:Sha Li、Ziwei Tang、Yang Wang、Dan Wang、Zhanlin Wang、Chenxia Yu、Tuanjie Li、Donghui Wei、Changsheng Yao
DOI:10.1021/acs.orglett.8b04082
日期:2019.3.1
carbene (NHC) catalyzed γ-specific aldol-like reaction between allenoates and isatins has been achieved under mild conditions, giving trisubstituted allene derivatives bearing isatin moiety in moderate to good yields with high diastereoselectivity and excellent atom efficiency. The DFT computations indicated that the formation of the γ-adduct was more energetically favorable than that of the α-adduct. The
[EN] NOVEL KETOAMIDES WITH CYCLIC P4'S AS INHIBITORS OF NS3 SERINE PROTEASE OF HEPATITIS C VIRUS<br/>[FR] NOUVEAUX CETOAMIDES A P4 CYCLIQUES EN TANT QU'INHIBITEURS DE LA NS3 SERINE PROTEASE DU VIRUS DE L'HEPATITE C
申请人:SCHERING CORP
公开号:WO2005085242A1
公开(公告)日:2005-09-15
The present invention discloses novel compounds which have HCV protease inhibitory activity as well as methods for preparing such compounds. In another embodiment, the invention discloses pharmaceutical compositions comprising such compounds as well as methods of using them to treat disorders associated with the HCV protease.
Hypervalent iodine(<scp>iii</scp>) induced oxidative olefination of benzylamines using Wittig reagents
作者:Vijayalakshmi Ramavath、Bapurao D. Rupanawar、Satish G. More、Ajay H. Bansode、Gurunath Suryavanshi
DOI:10.1039/d1nj01170g
日期:——
and secondary benzylamines using 2C-Wittig reagents, which provides easyaccess to α,β-unsaturated esters. Mild reaction conditions, good to excellent yields with high (E) selectivity, and a broad substrate scope are the key features of this reaction. We have successfully carried out the gram-scale synthesis of α,β-unsaturated esters.