Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1990-08-24
1992-04-21
Raymond, Richard L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564192, 564215, 564217, 564218, 560 19, 560 43, 560 47, 558408, 558409, C07C23315
Patent
active
051070227
ABSTRACT:
The invention relates to a process for the preparation of compounds of formula ##STR1## wherein R is unsubstituted or substituted C.sub.1 -C.sub.4 alkyl or unsubstituted or substituted phenyl, X is hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 alkyl, and Y is unsubstituted or substituted C.sub.1 -C.sub.4 alkyl, which process comprises subjecting compounds of formula ##STR2## wherein R, X and Y are as defined for formula I, to catalytic hydrogenation in the alkaline pH range.
The compounds obtained by the process of this invention are suitable intermediates for the synthesis of dyes.
REFERENCES:
patent: 2407309 (1946-09-01), Lott et al.
patent: 3891685 (1975-06-01), Hari et al.
patent: 4185036 (1980-01-01), Cossaboon
patent: 4283556 (1981-08-01), Lang
Chem. Abstract 106:34591R (1986).
Matsui et al., Chem. Abstracts 83, 96698W (1975).
Ciba-Geigy Corporation
Kumar S.
Mansfield Kevin T.
McC. Roberts Edward
Raymond Richard L.
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