PROCESS FOR THE MANUFACTURING OF INTERMEDIATE PRODUCTS FOR THE SYNTHESIS OF GLUCOSE-6-PHOSPHATASE INHIBITORS AND NEW INTERMEDIATE PRODUCTS

摘要

The preparation of arylcyclopropylmethoxy-cyclohexanecarboxylic acid derivs. of formula (I) comprises a) base-catalysed hydrolysis of the lactone ring of a 1,2-O-cyclohexylidene-3,5-lactonyl-cyclohexane-1,2-diol of formula (II) to the alcohol of formula (III); treatment of (III) with acid chloride in the presence of base to give the ester of formula (IV); treatment of (IV) with carbene to give a mixt. of diastereoisomers (VA) and (VB) (the configuration at the C atoms marked with an asterisk being 2S,1R (VA) or 2R,1S (VB)). (VA) predominates and is sepd. from the mixt. by crystallisation prior to conversion into (I) by alkaline hydrolyses. R = F, Cl or Me. R1 = 1-10C alkyl or benzyl; R2 = 1-10C alkyl, phenyl or naphthyl. Compounds (I), (III), (IV) and (VA) are new.