Patent ID: 6054596
Filing Date: 2000-04-25
Classification: C07D

Abstract:
A process for producing a cyclic ester, which comprises, in the presence of a salt of a weak acid with an alkali metal or alkaline earth metal, reacting a diol shown by the following formula (1): ##STR5## wherein n denotes an integer of 0 to 5, R.sup.1 and R.sup.2 are the same or different and each represents a hydrogen atom or unsubstituted straight- or branched-chain C.sub.1-6 alkyl groups, and may bond together to form a ring together with the adjacent carbon atoms, with the proviso that R.sup.1 and R.sup.2 are not concurrently hydrogen atoms in the case of n=0with a carbonic ester shown by the following formula(2): ##STR6## wherein R.sup.3 and R.sup.4 are the same or different and each represents a non-reactive organic group, and may bond together to form a ring together with the adjacent oxygen atomsto produce a cyclic carbonic ester shown by the following formula (3): ##STR7## wherein R.sup.1, R.sup.2 and n have the same meanings as defined above.