[EN] PREPARATION OF SUBSTITUTED BUTENOLIDES VIA PALLADIUM-FREE ETHERIFICATION AND AMINATION OF MASKED MUCOHALIC ACIDS<br/>[FR] PREPARATION DE BUTENOLIDES SUBSTITUES PAR ETHERIFICATION SANS PALLADIUM ET AMINATION D'ACIDES MUCOHALIQUES MASQUES
申请人:WARNER LAMBERT CO
公开号:WO2005026141A2
公开(公告)日:2005-03-24
Methods and materials for preparing 4-substituted-2-buten-4-olidos are disclosed. The methods include reacting a masked mucohalic acid with a primary or secondary amine or with an arylol in the presence of a base. Unlike existing processes, the disclosed methods do not require the use of palladium, which make them well suited for preparing intermediates in drug syntheses.