申请人:Mulholland Nicholas Phillip
公开号:US20140206633A1
公开(公告)日:2014-07-24
The present invention relates to processes for the preparation of compounds of formula IB wherein A
1
, A
2
, A
3
, A
4
, L, Y
1
, Y
2
, R
1
, R
2
, R
3
, R
4
and R
5
are as defined in the claims, comprising reacting a compound of formula (II) wherein Y
1
, Y
2
, L, A
1
, A
2
, R
1
, R
2
, R
3
, R
4
and R
5
are as defined for the compound of formula (I); with hydroxylamine in the presence of water, a base and a chiral phase transfer catalyst, which chiral phase transfer catalyst is a quinine derivative. The invention also relates to compounds of formula IB and enantiomerically enriched mixtures comprising compounds of formula IB.
本发明涉及制备式IB化合物的过程,其中A1、A2、A3、A4、L、Y1、Y2、R1、R2、R3、R4和R5如所述的权利要求书中定义,包括在水、碱和手性相转移催化剂的存在下,将式II化合物与羟胺反应,其中Y1、Y2、L、A1、A2、R1、R2、R3、R4和R5如式I的化合物所定义;所述手性相转移催化剂为奎宁衍生物。本发明还涉及式IB化合物和包含式IB化合物的对映富集混合物。