Photochromic chromene derivatives

Details Photochromic chromene derivatives Photochromic chromene derivatives

1995-10-30

1997-12-30

Richter, Johann

Compositions

Light transmission modifying compositions

Displaying color change

351163, 524109, 524110, 544150, 544378, 546197, 549387, C07D49304

Patent

active

057026459

ABSTRACT:
Described herein are photochromic compounds or a structural isomer of the photochromic compound, the photochromic compounds represented by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.4, R.sub.5, R.sub.6, R.sub.8, A, B, C, and D are each selected from the group consisting essentially of hydrogen, a stable organic radical, a heterocyclic group, halogen, a nitrogen-substituted radical, and a nitrogen-substituted ring radical.

REFERENCES:
patent: 3567605 (1971-03-01), Becker
patent: 4685783 (1987-08-01), Heller et al.
patent: 4818096 (1989-04-01), Heller et al.
patent: 4826977 (1989-05-01), Heller et al.
patent: 4882438 (1989-11-01), Tanaka et al.
patent: 4931221 (1990-06-01), Heller
patent: 4990287 (1991-02-01), Bennion et al.
patent: 5055576 (1991-10-01), Castaldi et al.
patent: 5106998 (1992-04-01), Tanaka et al.
patent: 5238981 (1993-08-01), Knowles
patent: 5242624 (1993-09-01), Malatesta et al.
patent: 5244602 (1993-09-01), Van Gemert
patent: 5274132 (1993-12-01), VanGemert
Dean et al., CA 110:135109 (1989).
Sadykov et al., CA 110:23409 (1989).
Venugopalan et al., CA 102:220767 (1985).
Liska, CA 78:11445 (1973).
Besace et al., CA 75:88236 (1971).
Besace, Yvon, Israel Marszak, and Jocelyne Maisse; Synthesis and Applications of Monoaryl Ethers of Butynediol; Bull. Soc. Chim. Fr.; No. 6; pp. 2275-2279; (1971).
Dean, Francis M., Steven N. France and Ulku Oyman; Cation Radicals in the Bromination of Benzodipyran Derivatives; Tetrahedron; vol. 44, No. 15; pp. 4857-4862; (1988).
Liska, Kenneth J.; Preparation and Antitumor Properties of Analogs of Acronycine; Journal of Medicinal Chemistry; vol. 15, No. 11; pp. 1177-1179; (1972).
Sadykov, T., K.B. Erzhanov, M.B. Basymbekov, and S.D. Praliev; Hydration of o-, m-, and p-bit (Propynyloxy) Benzenes and Their Glycols; Ivz. Akad. Nauk Kaz. SSR, Ser. Khim; No. 1; pp. 63-67; (1988).
Venugopalan, Bindumadhavan and Kalpattu Kuppuswamy Balasubramanian; Studies on Claisen Rearrangement of Bis-Propargyl Ethers--Synthesis of Naphthodipyrans, Naphthodifurans and Naphthofuropyrans; Heterocycles; vol. 23, No. 1; pp. 81-92; (1985).

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