Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1984-02-16
1986-04-29
Lesmes, George F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
548219, 548328, C07D27762, C07D26362, C07D23504
Patent
active
045858756
ABSTRACT:
A process for preparing 4,4'-bis-benz-ox(-thi,-imid)-azol-2-yl-stilbenes of the formula ##STR1## wherein R, R.sup.1, R.sup.2 and R.sup.3 may be the same or different from each other and denote hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, chlorine, bromine, nitro or sulfo and X denotes oxygen, sulfur or NH, which comprises reacting a (4-chloromethyl)-iminobenzoic acid alkyl ester of the formula ##STR2## wherein R denotes C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxyethyl, or HCl salts thereof, with o-aminophenol, o-aminothiophenol or o-phenylene diamine and reacting the resulting 2-benz-ox(-thi,-imid)-azolyl-4-chloromethyl-benzenes with potassium hydroxide or sodium hydroxide in a polar aprotic solvent.
REFERENCES:
patent: 4156778 (1979-05-01), Rosner et al.
patent: 4282355 (1981-08-01), Erckel et al.
Vernigor et al., Chem. Heterocyc. Compounds, 17:328-332 (1981).
Khim. Geterotsik. Soedin. 1981, pp. 463-467 (Vernigor et al.).
Gibson S. A.
Hoechst Aktiengesellschaft
Lesmes George F.
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