METHOD FOR PREPARING 3-CHROMENE DERIVATIVES, USE OF SAID DERIVATIVES FOR PREPARING THIAZOLIDINONES

摘要

The invention concerns a method for preparing a compound of formula (Ig) wherein Rg, Rg<1> and Rg<2> and m are as defined in Claim 1, by reacting a phenol of formula (IIg) with a compound of formula (IIIg) in the presence of an acid derived from sulphinimide or sulphonimide.