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US 9,000,163 B2Granted
Method for producing aminothiazole derivative and production intermediate
AssigneeZeria Pharmaceutical Co., Ltd.
InventorsMasaaki Nagasawa, Kazuyasu Asami, Ryu Nakao, Nobuyuki Tanaka, Yoshiyuki Aida
Life of this patent
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Abstract
Provided is a method for selectively demethylating a 2-methoxy group. Specifically provided is a production method of a compound represented by formula (7) below through the following reactions.
Claims5
A compound represented by formula (3):
- wherein ring A represents a benzene ring or a 6-membered aromatic heterocycle;
- R1 represents a hydrogen atom;
- R2 and R3 each represent a methoxy group;
- R4 represents a hydrogen atom;
- and R5 represents a hydrogen atom or an electron-withdrawing group selected from a halogen atom, a nitro group, a trifluoromethyl group, a trichloromethyl group, a cyano group, an acetyl group, a sulfonic acid group, and an alkylsulfonic acid group.
2 more elements
Dependencies are inferred from the claim text.