A zulenes containing a urethane group

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters

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560 25, 560 26, 560 31, 560 32, 560115, 560158, 560162, C07C27110, C07C27128, C09B 5700, G11B 774

Patent

active

050877275

ABSTRACT:
Azulenesquaric acid dyes of the formula ##STR1## where L is substituted or unsubstituted C.sub.1 -C.sub.12 - alkylene,

REFERENCES:
patent: 4675423 (1987-06-01), Schrott et al.
patent: 4806664 (1989-02-01), Schrott et al.
Kim et al., Dyes and Pigments, vol. 8, pp. 381-388 (1987).
Ziegenbien et al., Angew. Chem. 78, p. 937 (1966).

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