Process for the preparation of...

Details Process for the preparation of... Process for the preparation of...

2007-01-23

2007-01-23

Witherspoon, Sikarl A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S346000, C560S115000, C560S122000

Reexamination Certificate

active

10332471

ABSTRACT:
5-[(4-chlorophenyl)methyl]-2,2-dimethylcyclopentanone is produced byreacting 1-[(4-chlorophenyl)methyl]-3-methyl-2-oxocyclopentanecarboxylic acid methyl ester or 1-[(4-chlorophenyl)methyl]-3-methyl-2-oxocyclopentanecarboxylic acid ethyl ester with sodium hydride and methyl halide, thenhydrolyzing the obtained 1-[(4-chlorophenyl)methyl]-3,3-dimethyl-2-oxocyclopentanecarboxylic acid methyl ester or 1-[(4-chlorophenyl)methyl]-3,3-dimethyl-2-oxocyclopentanecarboxylic acid ethyl ester. The process provides5-[(4-chlorophenyl)methyl]-2,2-dimethylcyclopentanone, an important intermediate of an agricultural or horticultural fungicide, e.g., Metconazole.

REFERENCES:
patent: 4938792 (1990-07-01), Kumazawa et al.
patent: 5258404 (1993-11-01), Ichinose et al.
patent: 5681979 (1997-10-01), Hoshi et al.
patent: 6344580 (2002-02-01), Wong
patent: 267778 (1988-05-01), None
patent: 0 329 397 (1989-08-01), None
patent: 413448 (1991-02-01), None
patent: 537909 (1993-04-01), None
patent: 731083 (1996-09-01), None
Henderson et al. A Quick and Efficient Route to 2-Substituted Cyclopentanones and Cyclohexanones. Synthesis (1983), (12), p. 996-997.

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