Surprising and Highly Efficient Use of Methylmagnesium Chloride as a Non-Nucleophilic Base in the Deprotonation and Alkylation of sp<sup>3</sup>
Centres Adjacent to Nitriles
We describe alkylation of 1° and 2° nitriles (and MeCN) using methylmagnesiumchloride (MeMgCl) for deprotonation in the presence of a catalytic amount of an amine with excellent conversions and selective mono‐ or dialkylation when there are two hydrogens on the sp3 centre adjacent to the nitrile. With primary nitriles we can sequentially introduce two different α‐alkyl groups and with acetonitrile
PROCESS FOR CYCLOHEXANECARBOXYLIC ACID DERIVATIVES
申请人:Hoffmann Ursula
公开号:US20090253927A1
公开(公告)日:2009-10-08
A process for the preparation of a compound of formula (I):
which are useful as intermediates in the preparation of i.a. pharmaceutically active compounds.
一种制备化合物(I)的方法:这些化合物在制备药用活性化合物中是有用的中间体。
PREPARATION FOR A CYCLOHEXANECARBOXYLIC ACID DERIVATIVE AND INTERMEDIATES
申请人:Harnett Gerard John
公开号:US20090253928A1
公开(公告)日:2009-10-08
A process for the preparation of a compound of formula (Ia):
which are useful as intermediates in the preparation of i.a. pharmaceutically active compounds.
一种制备化合物(Ia)的方法:这些化合物在制备药用活性化合物中作为中间体是有用的。
New Process
申请人:Harnett Gerard John
公开号:US20120071683A1
公开(公告)日:2012-03-22
A process for the preparation of a compound of formula (I):
which is useful as an intermediate in the preparation of pharmaceutically active compounds.