Di(bis-(indolyl)ethylenyl)tetrahalophtalides

Details Di(bis-(indolyl)ethylenyl)tetrahalophtalides Di(bis-(indolyl)ethylenyl)tetrahalophtalides

1989-08-23

1990-11-13

Shen, Cecilia

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

Organic compounds

Chalcogen in the nitrogen containing substituent

544 62, 544143, 544144, 546187, 546201, 548456, C07D41314, C07D40114, C07D40110, C07D40310

Patent

active

049703080

ABSTRACT:
Chromogenic di-[bis-(indolyl)ethylenyl] tetrahalophthalides are disclosed of the formula ##STR1## wherein each X.sup.1, X.sup.2, X.sup.3, and X.sup.4 is independently selected from chlorine or bromine;

REFERENCES:
patent: 4107428 (1978-08-01), Farber
patent: 4349679 (1982-09-01), Garner et al.
patent: 4812569 (1989-03-01), Eckstein

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