摘要:
A process for the preparation of intermediates useful for the synthesis of Diltiazem consisting in the racemization of (--)-cis-2,3-dihydro-3-hydroxy-2-(4-methoxyphenyl)-1,5-benzothiazepin-4(5H)-one is described.
摘要:
A process is described for the preparation of 2-methoxy-6-propionyl-naphthalene, an intermediate in the synthesis of naproxen.The process consists of Friedel-Crafts acylation of 2-methoxy-naphthalene, and obviates the drawbacks related to the use of nitrobenzene as solvent.
摘要:
A process for the kinetic resolution of cis or trans enantiomeric mixtures of the compounds of formula ##STR1## wherein R.sub.3 and X have the meanings reported in the specification and the asterisks mark the asymmetric carbon atoms, is described.The compounds of formula III-A are intermediates useful in the preparation of compounds active on the cardiovascular system.
摘要:
A process of spontaneous resolution of compounds of formula ##STR1## wherein R has the meanings reported in the description, is described. The compounds of formula III are intermediates useful for the preparation of Diltiazem.