Photochromic compounds

Details Photochromic compounds Photochromic compounds

1978-12-19

1980-01-08

Louie, Jr., Won H.

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

430962, G03C 524, G03C 152

Patent

active

041826299

ABSTRACT:
Photochromic compounds and useful applications thereof having the general formula: ##STR1## in which X represents oxygen or NR.sub.6, R.sub.6 being hydrogen, alkyl, aryl or aralkyl, R.sub.1 represents hydrogen, alkyl, aryl, or aralkyl, Y and Y.sub.1 being the same or different represent hydrogen, alkyl, halogen, or alkoxy, Z represents hydrogen, halogen, alkyl, alkoxy, or aryloxy R.sub.5 represents hydrogen, alkyl, alkoxy, or aryloxy, R.sub.4 represents alkyl or aryl, and R.sub.2 and R.sub.3 represent the same or different alkyl, aralkyl or aryl groups or one of R.sub.2 and R.sub.3 represents hydrogen and the other is alkyl, aralkyl, or aryl, and with the proviso that when Z or Y is alkoxy or aryloxy, R.sub.1 is other than hydrogen.

REFERENCES:
Hart et al.: Chemical Communication, 1968, pp. 1627-1628.
Santiago et al.: J. Am. Chem. Soc. 90 (1968), pp. 3654-3658.
El-Assal et al.: J. Chem. Soc. (1963), pp. 2983-2988.
Brunow et al.: Acta Chem. Scand. 22 (1965), pp. 590-595.

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