Photochromic compounds

Details Photochromic compounds Photochromic compounds

1996-12-23

1998-11-10

Tucker, Philip

Compositions

Light transmission modifying compositions

Displaying color change

544 71, 540466, 540543, G02B 523, C07D26500

Patent

active

058338853

ABSTRACT:
A spiro (indolino) oxazine compound of general formula (I) ##STR1## wherein R.sub.1 represents a group of the formula --NR.sub.2 R.sub.3 wherein each of R.sub.2 and R.sub.3, which may be the same or different, independently represents an alkyl group, or a carbocyclic group, preferably aryl, or a heterocyclic group, or R.sub.2 and R.sub.3 taken together with the nitrogen atom to which they are attached represent a heterocyclic ring having one or more heteroatoms and which may optionally carry at least one substituent selected from alkyl, aryl or heteroaryl groups;

REFERENCES:
patent: 4980089 (1990-12-01), Heller
patent: 4986934 (1991-01-01), Kwiatkowski et al.
patent: 5066818 (1991-11-01), Gemert et al.
patent: 5106998 (1992-04-01), Tanaka et al.
patent: 5114621 (1992-05-01), Guglielmetti
patent: 5266447 (1993-11-01), Takahashi et al.
patent: 5330686 (1994-07-01), Smith et al.
patent: 5340857 (1994-08-01), Van Gemert
K. Yamamoto et al., Chemical Abstracts, vol. 116, No. 12, Abstract No. 116688y, Mar. 23, 1992, p. 710.
S. Yamamoto et al., Chemical Abstracts, vol. 116, No. 4, Abstract No. 31510j, Jan. 27, 1992, p. 722.
Ya. N. Malkin et al., "Quantitative Study of the Photostability of Spiropyrans," J. Photochem. Photobiol. A, vol. 49, No. 1-2, 1989, pp. 75-88.
Ya. N. Malkin et al., "Quantitative Study of the Photostability of Spiropyrans," vol. 39, No. 2, 1990, pp. 236-242.
T. B. Krasieva et al., "Photochemistry of Spiropyrans of the Dithiolane Series With Polycondensed Chromene Fragments," vol. 38, No. 11, 1989, pp. 2297-2302.
Vijaya Kumar et al., Glycomaurin and Glycomaurrol, New Carbazole Alkaloids from Glycosmis mauritiana (Rutaceae) Bark, Aust. J. Chem., 1989, 42, pp. 1375-1379.
Chihiro Ito et al., New Carbazole Alkaloids from Murraya euchrestifolia Hayata, Chem., Pharm. Bull, 38(6), 1990, vol. 38, No. 6, pp. 1548-1550.
Chemical Abstract, Some reactions of coumestans, vol. 84, 1976, p. 564.
Motoi Yogo et al., Synthesis of Some Carbazolequinone Alkaloids and Their Analogues, Facile Palladium-Assisted Intramolecular Ring Closure of Arylamino-1,4-benzoquinones To Carbazole-1,4-quinones, Chem. Pharm. Bull, 39(2), vol. 39, No. 2, pp. 328-334.
David Creed et al., Photochemistry of Electron-Transport Quinones. II..sup.1 Model Studies with Plastoquinone-1 American Chemical Society, 93(2), Jan. 27, 1971, pp. 502-511.
Asish DE, Studies in Sulphur Heterocycles: Part III--Syntheses of Tricyclic Compounds with Condensed Thiophene Rings, Indian Journal of Chemistry, vol. 23B, Oct. 1984, pp. 918-925.
Yun-Cheung Kong et al., Micromelum: a Key Genus in the Chemosystematics of the Clauseneae, Biochemical Systematics and Ecology, vol. 16, No. 5, 1988, pp. 485-489.

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