[EN] PROCESS FOR PREPARING 2-OXO-1-PYRROLIDINE DERIVATIVES BY INTRAMOLECULAR ALLYLATION [FR] PROCESSUS DE PREPARATION DE DERIVES 2-OXO-1-PYRROLIDINE PAR ALLYLATION INTRAMOLECULAIRE
Allyl esters substituted by a difluoromethylene group, their process of synthesis and their use, and a process for functionalizing a double bond
申请人:RHODIA CHIMIE
公开号:US20040147789A1
公开(公告)日:2004-07-29
This invention provides compounds of formula:
1
in which R
f
is a radical that carries a perfluoromethylene group, which group ensures bonding to the remainder of the molecule; R1 and R3, which can be the same or different, are chosen from among hydrogen and alkyl or aryl radicals; &PSgr; is an electroattractor group such that &PSgr;-O—H is an acid whose pKa (in water) is at most equal to 8, advantageously 6, and preferably 5. These compounds are useful for the synthesis of nitrogen-containing heterocyclic compounds.
[EN] PROCESS FOR PREPARING 2-OXO-1-PYRROLIDINE DERIVATIVES BY INTRAMOLECULAR ALLYLATION<br/>[FR] PROCESSUS DE PREPARATION DE DERIVES 2-OXO-1-PYRROLIDINE PAR ALLYLATION INTRAMOLECULAIRE
申请人:UCB SA
公开号:WO2005121082A1
公开(公告)日:2005-12-22
The present invention relates to a new process for preparing 2-oxo-1-pyrrolidine derivatives of general formula (I), comprising the cyclisation of an intermediate of general formula (II) wherein the substituents are as defined in the specification.