Claims
- 1. A photochromic compound of the general formula: ##STR8## wherein X represents oxygen or >NR.sub.6, R.sub.6 being hydrogen, alkyl, aryl or aralkyl,
- R.sub.1 represents, alkyl, aryl or aralkyl,
- Y and Y.sup.1 are the same or different and 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, aryl or aralkyl, 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, aryl or aralkyl.
- 2. The compound of claim 1 wherein R.sub.4 is alkyl and R.sub.5 is alkoxy.
- 3. The compound of claim 2 wherein Z is alkoxy.
- 4. The compound of claim 1 wherein R.sub.4 is alkyl and R.sub.1 is alkyl or aryl.
- 5. The compound of claim 4 wherein Y is other than hydrogen.
- 6. The compound of claim 1 wherein R.sub.4 is lower alkyl and R.sub.5 is lower alkoxy.
- 7. The compound of claim 6 wherein R.sub.4 is methyl and R.sub.5 is methoxy.
- 8. A photochemical compound having the following general formula: ##STR9## wherein, X represents oxygen or >NR.sub.6, R.sub.6 being hydrogen, alkyl or aryl,
- R.sub.1 represents hydrogen, alkyl or aryl,
- Y and Y.sup.1 are the same or different and represent hydrogen, alkyl, or halogen,
- Z represents hydrogen, halogen, or alkyl,
- R.sub.5 represents alkoxy or aryloxy,
- R.sub.4 represents aryl or alkyl, and
- R.sub.2 and R.sub.3 represent the same or different alkyl, aryl or aralkyl groups, or one of R.sub.2 and R.sub.3 represents hydrogen and the other is alkyl or aryl.
- 9. The compound of claim 8 wherein R.sub.5 is methoxy and R.sub.4 is methyl.
- 10. The compound of claim 8 wherein X is oxygen.
- 11. A photochromic compound of the general formula: ##STR10## wherein X represents oxygen or >NR.sub.6, R.sub.6 being hydrogen, alkyl or aryl,
- R.sub.1 represents alkyl or aryl,
- Y represents alkyl, halogen or alkoxy.
- Y.sup.1 represents hydrogen, alkyl, halogen or alkoxy.
- R.sub.5 represents hydrogen, alkyl, alkoxy or aryloxy,
- Z represents, hydrogen, halogen, 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 or aryl groups or one of R.sub.2 and R.sub.3, represents hydrogen and the other is alkyl or aryl.
- 12. The compound of claim 1 wherein X is >NR.sub.6 and R.sub.6 is substituted aryl.
Priority Claims (1)
Number |
Date |
Country |
Kind |
41233/73 |
Sep 1973 |
GBX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of Ser. No. 502,095, filed Aug. 30, 1974, now abandoned.
Non-Patent Literature Citations (4)
Entry |
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. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
502095 |
Aug 1974 |
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