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Title:
INDOLINOSPIROBENZOPYRAN DERIVATIVE
Document Type and Number:
WIPO Patent Application WO/1992/016505
Kind Code:
A1
Abstract:
A novel compound suitable for use as thermochromic and photochromic materials, namely an indolinospirobenzopyran derivative represented by general formula (I), and a process for the production thereof, wherein R1 represents C1 to C20 alkyl, aralkyl, methacryloxymethyl or methacryloxyethyl; R2, R3, R4, R5, R6 and R7 represent each hydrogen, etc.; R8 represents hydrogen, methacryloxymethyl, etc.; and Y represents oxygen or sulfur.

Inventors:
MIYASHITA AKIRA (JP)
Application Number:
PCT/JP1992/000292
Publication Date:
October 01, 1992
Filing Date:
March 11, 1992
Export Citation:
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Assignee:
OTSUKA KAGAKU KK (JP)
International Classes:
C07D209/10; C07D209/12; C07D491/10; C07D491/107; C07D495/10; C09K9/02; G03C1/685; G03C1/73; (IPC1-7): C07D209/10; C07D209/12; C07D209/18; C07D491/107; C07D495/10; C09K9/02
Foreign References:
JPS635395B21988-02-03
JPS6054388A1985-03-28
JPS4930447B11974-08-13
Other References:
See also references of EP 0529100A4
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