[EN] PROCESS FOR THE PREPARATION OF ISOXAZOLINE DERIVATIVES<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DÉRIVÉS D'ISOXAZOLINE
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2011104089A1
公开(公告)日:2011-09-01
The present invention relates to processes for the preparation of compounds of formula IB wherein A1, A2, A3, A4, L, Y1, Y2, R1, R2, R3, R4 and R5 are as defined in the claims, comprising reacting a compound of formula (II) wherein Y1, Y2, L, A1, A2, R1, R2, R3, R4 and R5 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.
PROCESS FOR THE PREPARATION OF ISOXAZOLINE DERIVATIVES
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.