Stereocontrolled synthesis of conformationally restricted enantiopure triols and dihydroxy acids based on the norbornane framework
摘要:
The synthesis of chiral, rigid analogues of glycerol and cyclitols has been achieved by means of the stereocontrolled reduction of chiral bridgehead-Substituted camphorquinones. This simple and easy procedure exclusively affords dillydroxy derivatives with a 2,3-cis-exo-configuration. The employment of different hydrides has also allowed the synthesis of enantiopure 2,3-dillydroxy carboxylic acids with high diastereoselectivity. (c) 2005 Elsevier Ltd. All rights reserved.
[EN] PYRIDAZINE DERIVATIVES AS RORc MODULATORS<br/>[FR] DÉRIVÉS DE PYRIDAZINE UTILISÉS EN TANT QUE MODULATEURS DE RORC
申请人:HOFFMANN LA ROCHE
公开号:WO2016177710A1
公开(公告)日:2016-11-10
Compounds of formula I, or pharmaceutical salts thereof, wherein R1, R2, R3 and R4 are as defined herein. Also disclosed are methods of making the compounds and using the compounds for treatment of inflammatory diseases such as arthritis.
The mechanism of the Leuckartreaction of 3,3- and 7,7-dimethyl-2-oxo-1-norbornyl triflates and triflamides, synthesised by us starting from (1R)-camphor and (1R)-fenchone, has been studied. Strikingly, the electron-withdrawing capacity of the bridgehead substituents has demonstrated not to be enough to control the Wagner–Meerwein rearrangement during the course of the reaction, so that only both enantiomers
Enantiospecific synthesis of substituted bicyclo[2.1.1]hexane-1-carboxylic acids and esters
作者:A.García Martínez、E.Teso Vilar、J.Osío Barcina、M.E.Rodriguez Herrero、S.de la Moya Cerero、M. Hanack、L.R. Subramanian
DOI:10.1016/s0957-4166(00)80096-8
日期:1993.11
The base promoted ringcontraction of the readily accessible homochiral 2-oxo-1-norbornyl inflates 3 in 60% ethanol takes place with formation of bicyclo[2.1.1]hexane (4a), (+)- or (−)-7,7-dimethyl-bicyclo[2.1.1]hexan-1-carboxylic acids (4c or 4b) and the corresponding ethyl esters in good yields.
A facile synthesis of new homochiral β-amino alcohols with norbornane framework
作者:A.García Martínez、E.Teso Vilar、A.García Fraile、S.de la Moya Cerero、P.Martínez Ruiz、L.R. Subramanian
DOI:10.1016/0957-4166(96)00136-x
日期:1996.5
New homochiral 1,2-amino hydroxy derivatives of norbornane are easily prepared starting from naturally occurring 2-norbornanones. Copyright (C) 1996 Elsevier Science Ltd
PYRIDAZINE DERIVATIVES AS RORc MODULATORS
申请人:Genentech, Inc.
公开号:US20180051010A1
公开(公告)日:2018-02-22
Compounds of formula I:
or pharmaceutical salts thereof,
wherein R
1
, R
2
, R
3
and R
4
are as defined herein. Also disclosed are methods of making the compounds and using the compounds for treatment of inflammatory diseases such as arthritis.