Mono(indolylethylenyl)phthalides

Details Mono(indolylethylenyl)phthalides Mono(indolylethylenyl)phthalides

C - Chemistry, Metallurgy

09

B

C09B 23/10 (2006.01) B41M 5/145 (2006.01) B41M 5/327 (2006.01) C07D 405/14 (2006.01) C07D 413/14 (2006.01) C07D 455/04 (2006.01)

Patent

CA 2085620

Preparation of novel mono(indolylethylenyl) phthalides is disclosed. Specifically, these compounds are chromogenic mono(indolylethylenyl)phthalides of the formula (see formula I) wherein A is as hereinafter defined and selected from moieties of the type (see formula II, III, IV, V) -28- wherein L is an indole moiety as hereinafter defined; wherein B is a moiety of the type Image as hereinafter defined. The process disclosed comprises condensing indolylethylene with a keto acid or its derivative and an electron acceptor in an organic solvent. -29-

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