Producing z-isomer of acid salt of 2-aminothiazole derivative

Details Producing z-isomer of acid salt of 2-aminothiazole derivative Producing z-isomer of acid salt of 2-aminothiazole derivative

C - Chemistry, Metallurgy

07

D

C07D 277/40 (2006.01)

Patent

CA 2289176

There is disclosed a process for producing an acid salt of a (Z)-2--aminothiazole compound of the formula (I): (see formula I) wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, Y represents a halogen atom, -OSO3H or -OPO(OH)2, m indicates the valence number of an inorganic acid of the formula: HY wherein Y represents the same as defined above, and n indicates an integer of 1 or 2, which process is characterized by: reacting an acid salt of a 2-aminothiazole compound of the formula (II): (see formula II) wherein R1 and R2 independently represent an alkyl group having 1 to 5 carbon atoms, X represents a bromine atom or an iodine atom, and the wavy line means that this compound is a mixture of the E-- and Z-isomers, with the inorganic acid of the formula HY.

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