Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Reexamination Certificate
2007-04-19
2008-07-29
Eyler, Yvonne (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
Reexamination Certificate
active
07405325
ABSTRACT:
A process for the preparation of 4-hydroxyalkylamino-2-nitro-anisoles of the general formula (I)wherein m is 2 or 3;by reaction of a 4-halogeno-3-nitro-aniline of formula (II) with a chloroalkyl-chloroformate of formula (III), alkaline ring closure of the resulting carbamate and nucleophilic replacement of the halogeno atom by a methoxy group to form a derivative of formula (IV), and finally ring opening of the resulting cyclic carbamate by treatment with methanolic alkali metal hydroxide, followed by neutralization with inorganic or organic acids, wherein the complete reaction is executed in a non-aqueous medium; as well as process for the preparation of 2-amino-4-hydroxyalkylamino-anisoles of formula (V)
REFERENCES:
patent: 5508467 (1996-04-01), Bauer et al.
patent: 3536066 (1986-04-01), None
patent: 3806237 (1989-10-01), None
European Search Report, Application No. 06008163.5, dated Oct. 13, 2006 (4 pages).
Braun Hans-Jürgen
Göttel Otto
Morand Emmanuel
Cho Jennifer Y
Eyler Yvonne
McKelvey Idris N.
The Procter & Gamble & Company
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