Title:
PHOTOCHROMIC SIX-MEMBERED HETEROCYCLIC-FUSED NAPHTHOPYRANS
Document Type and Number:
WIPO Patent Application WO2000002883
Kind Code:
A3
Abstract:
Described are novel photochromic six-membered heterocyclic-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted six-membered heterocyclic group fused to one side of the naphtho portion of the naphthopyran and having certain substituents at the position ortho to the oxygen atom of the naphthopyran ring. These compounds may be represented by graphic formula (A). Also described are polymeric organic host materials that contain or that are coated with such compounds or combinations thereof with complementary photochromic compounds, e.g., certain other naphthopyrans, benzopyrans, and spiro (indoline)type compounds.
Inventors:
KUMAR ANIL
Application Number:
PCT/US1999/015524
Publication Date:
February 24, 2000
Filing Date:
July 09, 1999
Export Citation:
Assignee:
TRANSITIONS OPTICAL INC (US)
International Classes:
C07D493/04; C07D498/04; (IPC1-7): C07D493/04; C07D491/04; C08K5/15; G02B5/23
Domestic Patent References:
| WO1999028323A1 | 1999-06-10 | |||
| WO1997015565A2 | 1997-05-01 | |||
| WO1997021698A1 | 1997-06-19 |
Foreign References:
| US5679805A | 1997-10-21 | |||
| US5674432A | 1997-10-07 | |||
| US5565147A | 1996-10-15 | |||
| US5458814A | 1995-10-17 |
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