发明名称 |
VERFAHREN ZUR HERSTELLUNG VON DISTYRYLBIPHENYLVERBINDUNGEN |
摘要 |
Method for the preparation of distyrylbiphenyl compounds of the formula (1) <IMAGE> in which R1 denotes hydrogen, C1-C5-alkyl or halogen; M denotes a salt-forming colourless cation; n denotes 2 or 4, by condensation of a substituted or unsubstituted 4,4'-bis(dialkoxyphosphonomethyl)diphenyl compound with a substituted benzaldehyde in liquid ammonia as a solvent and in the presence of strong bases; and the use of these distyrylbiphenyl compounds as optical brighteners. |
申请公布号 |
AT136883(T) |
申请公布日期 |
1996.05.15 |
申请号 |
AT19930810609T |
申请日期 |
1993.08.25 |
申请人 |
CIBA-GEIGY AG |
发明人 |
GUGLIELMETTI, LEONARDO, DR. |
分类号 |
C07C303/32;C07C309/32;C07C309/39;C11D3/42;D06L3/12;D21H21/30 |
主分类号 |
C07C303/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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