Solvent Free N-Alkyl and N-Arylimides Preparation from Anhydrides Catalyzed by TaCl5-Silica gel
摘要:
The first Lewis acid catalyzed and solvent free procedure for the preparation of imides from (he corresponding anhydrides is described involving TaCl5-silica gel as Lewis acid under microwave irradiation. (C) 1997 Elsevier Science Ltd.
Stereoselective Synthesis of 2-Aminocyclobutanols via Photocyclization of α-Amido Alkylaryl Ketones: Mechanistic Implications for the Norrish/Yang Reaction
作者:Axel G. Griesbeck、Heike Heckroth
DOI:10.1021/ja0111941
日期:2002.1.1
diastereospecificity was observed for the isoleucine derivatives (2S,3S)-1g and allo-(2S,3R)-1g; the Yang reaction dominated the photochemistry of allo-1g, whereas 1ggave preferentially Norrish II cleavage. The role of hydrogen bonding as one of the stereodirecting effects was demonstrated by comparison of the cyclization efficiency of the valine derivative 1e with 1h,i,j. Also, aromatic beta-keto esters
一系列手性 N-酰化 α-氨基对甲基丁酰苯衍生物 1a-1h 是通过三步程序从 α-氨基酸合成的。这些底物在苯中光解,得到 Norrish II 和 Norrish I 裂解产物以及 N-酰化的 2-氨基环丁醇,它们源自 γ-氢提取和 1,4-三重双自由基组合(阳环化)。形成具有特征杨/裂解比的产物。N-乙酰基保护底物 1b、e、f 光分解的量子产率适中 (12-26%);对于所有底物,环丁醇形成的非对映选择性都非常高。对异亮氨酸衍生物 (2S,3S)-1g 和同种异体-(2S,3R)-1g 观察到高非对映特异性;阳反应主导了allo-1g的光化学,而 1ggave 优先进行 Norrish II 裂解。通过比较缬氨酸衍生物 1e 与 1h,i,j 的环化效率,证明了氢键作为立体定向效应之一的作用。此外,芳族 β-酮酯以低产率得到阳环化产物。环丁醇形成的非对映选择性通过三步机制合理化,其中
Liver/plasma concentration ratio for dosing hepatitis C virus protease inhibitor
申请人:White E. Ronald
公开号:US20070021351A1
公开(公告)日:2007-01-25
Compositions and therapeutic combinations are provided including at least one compound selected from the group consisting of compounds of Formulae I to XXVI as defined herein as well as methods of treatment, prevention or amelioration of one or more symptoms of hepatitis C, treating disorders associated with HCV virus, modulating activity of HCV protease, in which liver to plasma concentration ratio of the compound ranges from about 2:1 to about 10:1.
Pharmaceutical formulations and methods of treatment using the same
申请人:Malcolm A. Bruce
公开号:US20070010431A1
公开(公告)日:2007-01-11
Pharmaceutical formulations containing at least one compound of Formulae I-XXVI herein and at least one surfactant. Pharmaceutically acceptable carriers and excipients may also be included in the formulations. The formulations of the present invention are suited for use in single unit dosages.
TRIAZOLE-ISOXAZOLE COMPOUND AND MEDICAL USE THEREOF
申请人:JAPAN TOBACCO INC.
公开号:US20160137639A1
公开(公告)日:2016-05-19
A compound represented by Formula [I]:
or pharmaceutically acceptable salt thereof, wherein each symbol is as defined in the description.
由式[I]表示的化合物:
或其药学上可接受的盐,其中每个符号如描述中所定义。
[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.