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US 4,052,457 AGranted
3,7,11,11-Tetramethyl-spiro-[5,5]undeca-8-ene-1-one
AssigneeTakasago Perfumery Co., Ltd.
InventorsAkira Nagakura, Michio Moroe, Yasuto Koyama, Haruki Kurihara
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Abstract
A novel spiro compound, 3,7,11,11-tetramethyl-spiro[5,5]-undeca-8-ene-1-one for altering the flavor or aroma of tobacco products. The spiro compound is prepared by reacting pulegone and piperylene in a solvent in the presence of a Lewis acid catalyst.
Claims5
3,7,11,11-tetramethyl-spiro[5,5]undeca-8-ene-1-one.
A process of producing 3,7,11,11-tetramethyl-spiro-[5,5]undeca-8-ene-1-one which comprises reacting pulegone and piperylene in an inert solvent under Diels-Alder reaction conditions in the presence of a Lewis-acid catalyst.
Dependencies are inferred from the claim text.