Patent ID: 6462205
Filing Date: 2002-10-08
Classification: C07D

Abstract:
A process for preparing a compound of the formula (I), in whichR1 represents substituted or unsubstituted alkyl, R3 represents hydrogen, substituted or unsubstituted alkyl, alkoxy, halogenoalkoxy or halogen, comprising the step of reacting: a compound of the formula (II) in whichR1 and R3 are each as defined above and R2 represents hydrogen, or substituted or unsubstituted alkyl, with a compound selected from the group consisting of an acid and a trialkylsilyl chloride, said trialkylsilyl chloride being present in the presence of a dialkyl sulphoxide, said process further optionally comprising the step of reacting said compound of the formula (I) with said compound selected from the group consisting of said acid and said trialkylsilyl chloride in a member selected from the group consisting of a diluent, a solvent, and combinations thereof.