Dimethylcyclobutanone compounds, dimethylcyclobutane compounds, and processes for preparing the same
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsNaoki Ishibashi, Yusuke Nagae, Takeshi Kinsho
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Abstract
The present invention provides a process for preparing a dimethylcyclobutane compound of the following general formula (1A), the process comprising reacting a dimethylcyclobutanone compound of the following general formula (2) with a phosphonic ester compound of the following general formula (3) to produce an unsaturated ester compound of the following general formula (4), having a dimethylcyclobutane ring, and subjecting the unsaturated ester compound (4), having a dimethylcyclobutane ring, to a reduction reaction to produce the dimethylcyclobutane compound (1A).
Claims2
A process for preparing a dimethylcyclobutanone compound of the following general formula (2A):
- wherein X12 represents an acyloxy group having 1 to 10 carbon atoms including a carbon atom of a carbonyl group, an alkoxycarbonyloxy group having 2 to 10 carbon atoms including a carbon atom of a carbonyl group, an alkanesulfonyloxy group having 1 to 10 carbon atoms, an arenesulfonyloxy group having 6 to 20 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an aryloxy group having 6 to 12 carbon atoms, a silyloxy group having 3 to 20 carbon atoms or a halogen atom,
- the process comprising
- reacting an acid halide of the following general formula (7):
- wherein X9 represents a halogen atom,
- with an allyl compound of the following general formula (8):
- H2C═CHCH2X12 (8)
- wherein X12 is as defined above,
- in the presence of a base to produce the dimethylcyclobutanone compound (2A).
A dimethylcyclobutanone compound of the following general formula (2B):
- wherein X13 represents an acyloxy group having 3 to 10 carbon atoms including a carbon atom of a carbonyl group, an alkoxycarbonyloxy group having 2 to 10 carbon atoms including a carbon atom of a carbonyl group, an alkanesulfonyloxy group having 1 to 10 carbon atoms, an arenesulfonyloxy group having 6 to 20 carbon atoms, an alkoxy group having 2 to 12 carbon atoms with a benzyloxy group being precluded, an aryloxy group having 6 to 12 carbon atoms, or a silyloxy group having 3 to 20 carbon atoms.
Dependencies are inferred from the claim text.