Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1983-03-21
1986-09-16
Warren, Charles F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564418, 564421, 564422, 564423, 564440, 564443, 568 30, 568 31, 568 44, 423584, C07C 8511
Patent
active
046123946
ABSTRACT:
A process for producing aminophenyl-.beta.-hydroxyethylsulfone of the formula (I), ##STR1## which comprises the following steps: (1) condensing nitrohalobenzene with mercaptoethanol in the presence of an alkali hydroxide and at least one reaction medium selected from N-alkyl-substituted amides and sulfoxides to produce mononitrophenyl-.beta.-hydroxyethylsulfide of the formula (II): ##STR2## (2) oxidizing the mononitrophenyl-.beta.-hydroxyethylsulfide (II) to produce mononitrophenyl-.beta.-hydroxyethylsulfone of the formula (III): ##STR3## and (3) reducing the mononitrophenyl-.beta.-hydroxyethylsulfone to produce the aminophenyl-.beta.-hydroxyethylsulfone of the formula (I). This compound is useful as an intermediate for aminophenyl-.beta.-sulfatoethylsulfone represented by the following formula: ##STR4## which is an important intermediate for vinyl sulfone type reactive dyes largely used for dyeing cellulose fiber materials.
REFERENCES:
patent: 3005852 (1961-10-01), Freyermuth et al.
patent: 3019266 (1962-01-01), Buc et al.
patent: 3019268 (1962-01-01), Buc et al.
patent: 4133869 (1979-01-01), Kim
Goto Kunihisa
Kaneoya Tatsuo
Kotera Norio
Masaki Shinzaburo
Tada Kazuhiro
Sumitomo Chemical Company Limited
Warren Charles F.
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