FIELD: industrial organic synthesis. SUBSTANCE: method of preparing distyrylbiphenyl compounds, which are used as optical bleaching agents for textile materials and paper and are also of value in detergent compositions, consists in that, condensation of 4,4'- bis(dialkoxyphosphonomethyl)diphenyl compound with substituted or unsubstituted benzaldehyde is carried out in liquid ammonia in presence of alkaline substances. EFFECT: facilitated separation of desired product from by-products. 17 cl, 12 ex
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1995 |
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1993 |
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1994 |
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1995 |
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