Method for producing 2-cyclopentenones
AssigneeSumitomo Chemical Company, Limited
InventorsKatsuyuki Shiota, Kunihiko Tanaka, Masayoshi Minai
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Abstract
A method for producing 2-cyclopentenones represented by the formula, ##STR1## wherein R represents an alkyl, alkenyl, cycloalkyl, substituted or non-substituted aryl or aralkyl group, which comprises heating 4-cyclopentenones represented by the formula, ##STR2## wherein R has the same meaning as above, in the presence of 1,8-diaza-bicyclo[5,4,0]undecene or its organic acid salt. The 2-cyclopentenones are useful as an intermediate for perfumes, medicines and agricultural chemicals.
Claims2
A method for producing a 2-cyclopentenone represented by the formula, ##STR5## wherein R represents an alkyl, alkenyl or cycloalkyl group having 7 or less carbon atoms respectively, or a phenyl, tolyl or benzyl group, which comprises heating a 4-cyclopentenone represented by the formula, ##STR6## wherein R has the same meaning as above, in the presence of 1,8-diaza-bicyclo[5,4,0]undecene or its organic acid salt wherein the organic acid is phenol, cresol, oleic acid or octylic acid.
Dependencies are inferred from the claim text.