US 11,807,602 B2
Processes for preparing a 3-isopropenyl-6-heptenal compound and a 6- isopropenyl-3-methyl-3,9-decadienyl carboxylate compound, and an intermediate therefor
Akihiro Baba, Joetsu (JP); Takeshi Kinsho, Joetsu (JP); Naoki Ishibashi, Joetsu (JP); and Yusuke Nagae, Joetsu (JP)
Assigned to Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
Filed by Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
Filed on Dec. 7, 2021, as Appl. No. 17/543,877.
Claims priority of application No. 2020-205403 (JP), filed on Dec. 10, 2020.
Prior Publication US 2022/0185763 A1, Jun. 16, 2022
Int. Cl. C07C 45/41 (2006.01); C07C 67/27 (2006.01); C07C 69/587 (2006.01); C07C 67/08 (2006.01); C07C 67/475 (2006.01)
CPC C07C 69/587 (2013.01) [C07C 45/41 (2013.01); C07C 67/08 (2013.01); C07C 67/27 (2013.01); C07C 67/475 (2013.01)] 12 Claims
 
1. A process for preparing a 3-isopropenyl-6-heptenal compound of the following formula (2):

OG Complex Work Unit Chemistry
wherein R1 represents a hydrogen atom or a methyl group,
the process comprising:
subjecting a 3-isopropenyl-6-heptenoate ester compound of the following formula (1):

OG Complex Work Unit Chemistry
wherein R1 is as defined above, and R2 represents a monovalent hydrocarbon group having 1 to 10 carbon atoms,
to a reduction reaction with a reducing agent to form the 3-isopropenyl-6-heptenal compound (2), wherein the reducing agent is selected from a group consisting of a complex hydride, an alkoxy derivative of the complex hydride, and an alkyl derivative of the complex hydride.