Development of two diastereoselective routes towards trans-4-aminomethyl-piperidin-3-ol building blocks
摘要:
Two diastereoselective, scaleable routes towards trans-3,4-disubstituted piperidines with a 4-hydroxymethyl-3-hydroxy or 4-aminomethyl-3hydroxy substitution pattern are being described. In the first route, the 3,4-trans configuration was introduced regio- and diastereoselectively via a hydroboration/oxidation sequence starting from 4-hydroxymethylpyridine. In the second route, regioselective epoxide ring opening of N-benzyl-3,4-epoxy-piperidine was achieved with LiCN, in situ generated from acetocyanohydrin and LiNH(2), The regioselectivity of both the hydroboration and the epoxide ring opening was positively influenced by the presence of the basic piperidine nitrogen. Both routes have been optimized to be performed at large scale. (C) 2008 Elsevier Ltd. All rights reserved.
A Novel Enantioselective Alkylation and Its Application to the Synthesis of an Anticancer Agent
作者:Shen-Chun Kuo、Frank Chen、Donald Hou、Agnes Kim-Meade、Charles Bernard、Jinchu Liu、Stacy Levy、George G. Wu
DOI:10.1021/jo034380t
日期:2003.6.1
A novel enantioselective alkylation of double benzylic substrates with secondary electrophiles is reported. A simple norephedrine-based chiral ligand was synthesized that gives alkylation product in 95% yield and 95% ee. A unique water effect on the enantioselectivity was unveiled. Good to excellent ee values were obtained with a number of double benzylic substrates and secondary electrophiles. This
Bicyclic heterocycles, drugs containing said compounds, the use thereof and method for preparing same
申请人:Himmelsbach Frank
公开号:US20070135463A1
公开(公告)日:2007-06-14
The present invention relates to bicyclic heterocycles of general formula
their tautomers, their stereoisomers, their mixtures and their salts, in particular their physiologically acceptable salts with inorganic or organic acids, which have valuable pharmacological properties, in particular an inhibitory action on the signal transduction mediated by tyrosine kinases, their use for the treatment of illnesses, in particular of tumoral diseases and of benign prostatic hyperplasia (BPH), of diseases of the lung and of the airways, and the preparation thereof.
METHOD FOR PRODUCING 1-(4-HYDROXYPHENYL)-4-(4-TRIFLUOROMETHOXYPHENOXY)PIPERIDINE OR SALT THEREOF
申请人:OTSUKA PHARMACEUTICAL CO., LTD.
公开号:US20180065931A1
公开(公告)日:2018-03-08
The present invention provides a method for producing 1-(4-hydroxyphenyl)-4-(4-trifluoromethoxyphenoxy)piperidine or a salt thereof, the method including the step of heating hydroquinone and 4-(4-trifluoromethoxyphenoxy)piperidine. This method can produce 1-(4-hydroxyphenyl)-4-(4-trifluoromethoxyphenoxy)piperidine or a salt thereof in an industrially advantageous manner.
[EN] THIAZOLIDINEDIONE COMPOUNDS HAVING ANTIDIABETIC, HYPOLIPIDAEMIC, ANTIHYPERTENSIVE PROPERTIES, PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS THEREOF<br/>[FR] COMPOSES DE THIAZOLIDINEDIONE PRESENTANT DES PROPRIETES ANTIDIABETIQUES, HYPOLIPIDEMIANTES, ANTIHYPERTENSIVES, LEUR PROCEDE DE PREPARATION ET COMPOSITIONS PHARMACEUTIQUES LES CONTENANT
申请人:DR. REDDY'S RESEARCH FOUNDATION
公开号:WO1997041120A1
公开(公告)日:1997-11-06
(EN) Novel thiazolidinedione antidiabetic compounds, their tautomeric forms, their derivatives, their stereoisomers, their polymorphs, their pharmaceutically acceptable salts, their pharmaceutically acceptable solvates and pharmaceuticals acceptable compositions containing them; methods for preparing the antidiabetic compounds and their uses.(FR) L'invention concerne de nouveaux composés antidiabétiques de thiazolidinedione, leurs formes tautomères, leurs dérivés, leurs stéréoisomères, leurs polymorphes, leurs sels pharmaceutiquement acceptables, leurs solvates pharmaceutiquement acceptables et des compositions pharmaceutiquement acceptables les contenant, des procédés de préparation des composés antidiabétiques et leurs utilisations.