Processes for making thiazolidinedione derivatives and compounds thereof

摘要

A compound of the formula: wherein A represents a ring group connected to the oxygen atom by a C1 to C6 hydrocarbon chain, R is hydrogen or a C1-C4 alkyl, and Q is hydrogen, or an amine protecting group such as acetyl, trifluoroacetyl, benzoyl, benzyl, or trityl, is useful in making thiazolidinedione derivatives such as pioglitazone, rosiglitazone and troglitazone.