Photochromic compounds

Details Photochromic compounds Photochromic compounds

1977-05-31

1979-03-20

Demers, Arthur P.

Harness for working animal

96 90PC, 2603265R, 2603409R, 26034674, 2603463, 542442, 542447, C07D20712

Patent

active

041455363

ABSTRACT:
Photochromic compounds of 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., Chem. Comm., 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. 2983-2987.
Brunow et al., Acta Chem. Scand. 22 (1968), pp. 590-595.

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