Processes for the preparation of squaraine compositions

Details Processes for the preparation of squaraine compositions Processes for the preparation of squaraine compositions

1984-01-11

1985-06-18

Shaver, Paul F.

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

Organic compounds

Amino nitrogen containing

C07C 8500, C07C 8502, C07C 8506

Patent

active

045242186

ABSTRACT:
Disclosed is an improved process for the preparation of squaraine compositions which comprises reacting squaric acid, an aromatic amine, and a composition selected from the group consisting of phenols and phenol squaraines, in the presence of an aliphatic alcohol, and an optional azeotropic substance.

REFERENCES:
patent: 3617270 (1971-11-01), Kampler et al.
patent: 3824099 (1974-07-01), Champ et al.
patent: 4150987 (1979-04-01), Anderson et al.
patent: 4311573 (1982-01-01), Mayhan et al.
patent: 4353971 (1982-10-01), Chang et al.
patent: 4390610 (1983-06-01), Bowden et al.
patent: 4391888 (1983-07-01), Chang et al.
patent: 4410616 (1983-10-01), Griffiths et al.
White et al., "J.A.C.S.", 86, pp. 453-458, 2/1964.

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