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US 4,511,655 AGranted
Process for producing 4-cyclopentenones
AssigneeSumitomo Chemical Company, Limited
InventorsMasayoshi Minai, Tadashi Katsura
Life of this patent
Estimating the term…
Abstract
A 4-cyclopentenone of the formula: ##STR1## wherein R is a lower alkyl group, a lower alkenyl group or a lower alkynyl group and R' is a hydroxyl group or an aliphatic acyloxy group, provided that in case of the dl-form, R' is not a hydroxyl group and also that the substituent R at the 2-position and the methyl group at the 3-position take a cis-configuration in the dl-, d- or l-form.
Claims11
A process for producing 4-cyclopentenones of the formula:
- ##STR5## wherein R is a lower alkyl group, a lower alkenyl group or a lower alkynyl group and R' is a hydroxyl group or an aliphatic acyloxy group, provided that the substituent R at the 2-position and the methyl group at the 3-position take a cis-configuration in the d- or l-form, which comprises hydrolyzing the corresponding 4-cyclopentenone wherein R' is an aliphatic acyloxy group in the dl-form with a microorganism or enzyme having a capability of selective hydrolysis of the d- or l-form in said starting corresponding 4-cyclopentenone in the dl-form to selectively obtain either the d- or l-form 4-cyclopentenone product.
Dependencies are inferred from the claim text.