发明授权
US5320784A Crystal comprising an indolinospirobenzothiopyran derivative and its
ring opened isomer
失效
包含吲哚螺四苯并噻喃衍生物及其开环异构体的晶体
- 专利标题： Crystal comprising an indolinospirobenzothiopyran derivative and its ring opened isomer
- 专利标题（中）： 包含吲哚螺四苯并噻喃衍生物及其开环异构体的晶体
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申请号： US938045申请日： 1992-11-12
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公开(公告)号： US5320784A公开(公告)日： 1994-06-14
- 发明人: Akira Miyashita
- 申请人： Akira Miyashita
- 申请人地址： JPX Osaka
- 专利权人： Otsuka Kagaku Kabushiki Kaisha
- 当前专利权人： Otsuka Kagaku Kabushiki Kaisha
- 当前专利权人地址： JPX Osaka
- 优先权： JPX3-47201 19910313
- 主分类号： B41M5/155
- IPC分类号： B41M5/155 ; C07D209/10 ; C07D495/10 ; C09K3/00 ; C09K9/02 ; G02F1/35 ; G02F1/355 ; G02F1/361 ; G03C1/685 ; G02B5/23 ; G02F1/00
摘要：
The object of this invention is to provide a novel compound suited for use as a piezochromic material.This invention relates to a crystal comprising an indolinospirobenzothiopyran derivative of the following general formula and its ring opened isomer. ##STR1## wherein R.sup.1 stands for C.sub.1-20 alkyl, aralkyl, methacryloxymethyl or a methacryloxyethyl; R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 may for example be hydrogen; R.sup.8 may for example be hydrogen or methacryloxymethyl.The invention further relates to a process for producing the crystal.
公开/授权文献
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