Process for preparing o-alkylhydroxylamine salts without the iso

Details Process for preparing o-alkylhydroxylamine salts without the iso Process for preparing o-alkylhydroxylamine salts without the iso

1994-01-03

1996-01-30

O'Sullivan, Peter

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

Organic compounds

Amino nitrogen containing

564256, 564259, C07C20900

Patent

active

054881625

ABSTRACT:
This invention relates to a process for preparing aqueous solutions of O-alkylhydroxylamine salts. The process involves converting hydroxylamine salts to their O-alkyl derivatives without the isolation of intermediates. More specifically, the process involves three steps. The first step, Step (A), involves forming a ketoxime. The second step, Step (B), involves adding an alkylating agent to the ketoxime formed in Step (A). The third step, Step (C), involves hydrolysing the alkylated ketoxime formed in Step (B) to yield an O-alkylhydroxylamine salt. O-alkylhydroxylamine salts are important intermediates in the preparation of herbicides.

REFERENCES:
patent: 4507248 (1985-03-01), Mathew et al.
patent: 5075504 (1991-12-01), Schneider
patent: 5393921 (1995-02-01), Lazar
Derwent Abstract WPI Acc. No. 92-004477/01 (JP 3258757) (1992).
Derwent Abstract WPI Acc. No. 84-309712/50 (JP 8368791) (1984).
Derwent Abstract WPI Acc. No. 88-072313/11 (DE 3631071) (1988).

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