# US 11,897,842 B2 · Method for producing 7-methyl-3-methylene-7-octenal acetal compound

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- Number: US 11,897,842 B2
- Document ID: US11897842B2
- Status: Granted
- Kind: B2
- Application number: 17/833,170
- Filed: 2022-06-06
- Published: 2022-09-29
- Granted: 2024-02-13
- Earliest claimed: 2017-11-29
- Assignees: Shin-Etsu Chemical Co., Ltd.
- Applicants: Shin-Etsu Chemical Co, Ltd.
- Inventors: Takeshi Kinsho; Akihiro Baba; Yusuke Nagae; Tomohiro Watanabe
- Web page: https://patentgrep.com/patent/US11897842B2

## CPC

- C07C 67/40: by oxidation of primary alcohols
- C07C 29/10: of ethers, including cyclic ethers, e.g. oxiranes
- C07C 29/14: of a —CHO group
- C07C 41/14: by exchange of organic parts on the ether-oxygen for other organic parts, e.g. by trans-etherification
- C07C 41/30: by increasing the number of carbon atoms, e.g. by oligomerisation
- C07C 45/42: by hydrolysis
- C07C 45/45: by condensation
- C07C 45/515: {the singly bound functional group being an acetalised, ketalised hemi-acetalised, or hemi-ketalised hydroxyl group (cyclic acetals or ketals C07C45/59, C07C45/60)}
- C07C 67/03: by reacting an ester group with a hydroxy group
- C07C 67/08: by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
- C07C 67/14: from carboxylic acid halides
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

A method for producing a 7-methyl-3-methylene-7-octenyl carboxylate compound (1), the method including the step of coupling a nucleophilic reagent of General Formula (8): wherein M is a cationic moiety, with an acetal compound of General Formula (9): wherein R1 and R2, which may be the same or different, are each an alkyl group having 1 to 6 carbon atoms, or are bonded to each other to form a divalent alkylene group having 2 to 12 carbon atoms, and X is a leaving group, to obtain the 7-methyl-3-methylene-7-octenal acetal compound.

## Claims

### Claim 1

A method for producing a 7-methyl-3-methylene-7-octenal acetal compound of General Formula (1):
the method comprising:
a step of coupling a nucleophilic reagent of General Formula (8):
wherein M is a cationic moiety,
with an acetal compound of General Formula (9):
wherein R1 and R2, which may be the same or different, are each an alkyl group having 1 to 6 carbon atoms, or are bonded to each other to form a divalent alkylene group having 2 to 12 carbon atoms, and X is a leaving group,
to obtain the 7-methyl-3-methylene-7-octenal acetal compound of General Formula (1).

### Claim 2

A 7-methyl-3-methylene-7-octenal acetal compound of General Formula (1):
wherein R1 and R2, which may be the same or different, are each an alkyl group having 1 to 6 carbon atoms, or are bonded to each other to form a divalent alkylene group having 2 to 12 carbon atoms.