Benzopyran compounds

Details Benzopyran compounds Benzopyran compounds

1994-03-30

1995-07-04

Tucker, Philip

Compositions

Light transmission modifying compositions

Displaying color change

549 42, 549383, 549389, 549457, G02B 523, C07D31178, C07D31192, C07D33350

Patent

active

054297745

ABSTRACT:
Described are novel reversible photochromic benzopyran compounds, examples of which are compounds having the 2,3 position of a benzofurano or benzothieno group fused to the f, g, or h side of the benzopyran, or a benzo group fused to the f side of the benzopyran, and (i) a substituted or unsubstituted phenyl and (ii) a substituted or unsubstituted benzothienyl or benzofuranyl group attached (via the 2 or 3 position of the group) at the 2 position of the pyran ring. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel benzopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro (indoline) type compounds, are also described.

REFERENCES:
patent: 2894003 (1959-07-01), Long et al.
patent: 2900396 (1959-08-01), Harrison
patent: 3562172 (1971-02-01), Ono et al.
patent: 3567605 (1971-03-01), Becker
patent: 3578602 (1971-05-01), Ono et al.
patent: 4215010 (1980-07-01), Hovey et al.
patent: 4342668 (1982-08-01), Hovey et al.
patent: 4637698 (1987-01-01), Kwak et al.
patent: 4720356 (1988-01-01), Chu
patent: 4816584 (1988-03-01), Kwak et al.
patent: 4818096 (1988-04-01), Heller et al.
patent: 4826977 (1989-05-01), Heller et al.
patent: 4931221 (1990-06-01), Heller
patent: 4980089 (1990-12-01), Heller
patent: 4990287 (1991-02-01), Bennion et al.
patent: 5066818 (1991-11-01), Van Gemert
patent: 5200116 (1993-04-01), Heller
patent: 5238981 (1993-08-01), Knowles
patent: 5244602 (1993-09-01), Van Gemert
patent: 5274132 (1993-12-01), Van Gemert
Friedel-Crafts and Related Reactions, George A. Olah, Interscience Publishers, vol. 3, Chap. XXXI, pp. 1-8, 1964.
"Regioselective Friedel-Crafts Acylation of 1,2,3,4-Tetrahydroquinoline and Related Nitrogen Heterocycles", Ishihara, Yugi et al, J. Chem. Soc., Perkin Trans. 1, pp. 3401-3406, 1992.
Heterocyclic Compounds, R. C. Elderfield, 1951, vol. 2, Chapters 3 and 5, pp. 123-144, pp. 164-172.
The Chemistry of Heterocyclic Compounds, H. D. Hartough et al, 1954, vol. 7, Chapter IV, pp. 225-282.
Advances in Heterocyclic Chemistry, A. R. Katritzky et al, 1974, vol. 16, Chapter V.
Akermark et al, Acta Chemica Scandinavica, vol. 13, 1959, pp. 1855-1862.
S. Granowitz et al, Acta Pharm. Suec., vol. 15, 1978, pp. 337-360.
J.A.C.S. vol. 61, Apr. 1939, pp. 951-956; Dibenzofuran. IX Metalation of Some Derivatives.
J.A.C.S. vol. 87(2), 1965, pp. 213-217; The Electron Spin Resonance Spectra of the Dibenzothiophene Radical Anion and its Isologs and the Electronic Structure of Conjugated Sulfur-Containing Heterocycles.
J.A.C.S. vol. 62, Mar. 1940, pp. 667-669. DiBenzofuran. XVIII. Isomeric Metalation Products of Some Phenols and their Methyl Ethers.

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