Process for squaraine compositions from half esters of squaric a

Details Process for squaraine compositions from half esters of squaric a Process for squaraine compositions from half esters of squaric a

1984-02-03

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

045242194

ABSTRACT:
This invention relates to an improved process for the preparation of squaraine compositions which comprises reacting an alkyl squarate, with an aniline, in the presence of an optional acid catalyst and an aliphatic alcohol.

REFERENCES:
patent: 2957918 (1960-10-01), Smutny et al.
patent: 3617270 (1971-11-01), Kampfer
patent: 4028418 (1977-06-01), Van den Brink et al.
patent: 4159387 (1979-06-01), Bellus
patent: 4216172 (1980-08-01), Heine et al.
White et al., "J.A.C.S.", 86, pp. 453-458, 2164.
The Chemistry of Squaraines, Schmidt, Oxocarbon, (1980), pp. 185-231.

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