Method for producing 2- (alkyl) cycloalkenone
US7057077B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Jan 30, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for producing 2-(alkyl)cycloalkenone and a method for producing alkyl(3-oxo-2-alkylcycloalkyl) acetate and 5-alkyl-5-alkanolide which are useful as flavoring materials and physiologically active substances using the same are provided. A method for producing Compound (2) including the steps of: dehydrating Compound (1) using an acid catalyst until the conversion ratio of dehydration reaction reaches 20 to 90% based on Compound (1), thereby obtaining a mixture containing Compound (1) and Compound (3); and isomerizing Compound (3) while dehydrating the remaining Compound (1), and a method for producing Compound (5) or (6) using obtained Compound (2).(wherein n represents 1 or 2, R1 and R2 each represent H, C1-8 alkyl groups and the like and R3 represents C1-3 alkyl groups).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.