Neighboring-group participation in the reaction catalyzed by purine nucleoside phosphorylase involves a compression mode between the 5'- and 4'-ribosyl oxygens, facilitated by His257. The His257Gly mutant opens a space in the catalytic site. Hydrophobic 5'-substituted Immucillins are transition-state analogue inhibitors of this mutant enzyme. Dissociation constants as low as 2 pM are achieved, with K-m/K-d as high as 400,000,000. (C) 2008 Elsevier Ltd. All rights reserved.
[EN] SUBSTITUTED 4,5,6,7-TETRAHYDRO-PYRAZOLO[1,5-a]PYRAZINE DERIVATIVES AND 5,6,7,8-TETRAHYDRO-4H-PYRAZOLO[1,5-a][1,4]DIAZEPINE DERIVATIVES AS ROS1 INHIBITORS<br/>[FR] DÉRIVÉS 4,5,6,7-TÉTRAHYDRO-PYRAZOLO[1,5-A]PYRAZINE SUBSTITUÉS ET DÉRIVÉS 5,6,7,8-TÉTRAHYDRO-4H-PYRAZOLO[1,5-A][1,4]DIAZÉPINE UTILISÉS COMME INHIBITEURS DE ROS1
申请人:JANSSEN PHARMACEUTICA NV
公开号:WO2015144799A1
公开(公告)日:2015-10-01
The present invention relates to substituted 4,5,6,7-tetrahydro-pyrazolo[1,5-a]pyrazine derivatives and 5,6,7,8-tetrahydro-4H-pyrazolo[1,5-a][1,4]diazepine derivatives of formula (I) wherein the variables have the meaning defined in the claims. The compounds according to the present invention are useful as ROS 1 inhibitors. The invention further relates to processes for preparing such novel compounds, pharmaceutical compositions comprising said compounds as an active ingredient as well as the use of said compounds as a medicament.
<i>O</i>-(Benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium Tetrafluoroborate (TBTU): A New Reagent for the Cleavage of Tetrahydropyranyl, Silyl and 4,4′-Dimethoxytrityl Ethers
作者:Kanda S. Ramasamy、Devron Averett
DOI:10.1055/s-1999-2724
日期:1999.6
A new reagent for the cleavage of tetrahydropyranyl, silyl and 4,4′-dimethoxytrityl ethers is described.
描述了一种用于裂解四氢吡喃基、硅基和 4,4′-二甲氧基三苯甲基醚的新试剂。
Immucillins in custom catalytic-site cavities
作者:Andrew S. Murkin、Keith Clinch、Jennifer M. Mason、Peter C. Tyler、Vern L. Schramm
DOI:10.1016/j.bmcl.2008.08.047
日期:2008.11
Neighboring-group participation in the reaction catalyzed by purine nucleoside phosphorylase involves a compression mode between the 5'- and 4'-ribosyl oxygens, facilitated by His257. The His257Gly mutant opens a space in the catalytic site. Hydrophobic 5'-substituted Immucillins are transition-state analogue inhibitors of this mutant enzyme. Dissociation constants as low as 2 pM are achieved, with K-m/K-d as high as 400,000,000. (C) 2008 Elsevier Ltd. All rights reserved.
A Simple and Convenient Method for the Deprotection of Tetrahydropyranyl Ether Using Iodine in Methanol
作者:Kanda S. Ramasamy、Rajanikanth Bandaru、Devron Averett
DOI:10.1080/00397919908086457
日期:1999.8
Abstract A simple and efficient method for the -deprotection of tetrahydropyranyl and 4,4′-dimethoxytrityl ethersusing iodine in methanol is described.