Processes for producing 4,6-bis (substituted)phenylazoresorcinol

Details Processes for producing 4,6-bis (substituted)phenylazoresorcinol Processes for producing 4,6-bis (substituted)phenylazoresorcinol

1998-04-28

1999-10-05

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

534688, 564442, 564443, C07C21302

Patent

active

059627409

ABSTRACT:
represents halogen atom, C.sub.1-5 alkyl group, hydroxycarbonyl or C.sub.1-5 alkoxy group, n represents 0 or an integer of 1 to 5, and two or more Rs are the same or different from each other, which comprises Cl, Br, OSO.sub.3 H or OPO.sub.3 H.sub.2, in an alkaline solvent, mixed with a solution or suspension of an alkali metal or alkaline earth metal hydroxide to obtain an alkaline mixture, and this alkaline mixture is mixed to be reacted with a solution or suspension containing resorcinol and/or its alkali metal salt or alkaline earth metal salt, or (b) a solution or suspension of a mixture of resorcinol with its alkali metal hydroxide or alkaline earth metal hydroxide 15 to 40 times by mol as much as the resorcinol. By the above-described method, the reaction volume can be reduced as compared with the conventional processes, and 4,6-bisphenylazoresorcinol can be obtained in high yield.

REFERENCES:
patent: 5453542 (1995-09-01), Morgan et al.
J. March, "Advanced Organic Chemistry", 4.sup.th John Wiley & Sons, p. 1224 (1992).

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