发明授权
US4384094A 3-Substituted-
7-dialkylamino-spiro(2H-1-benzopyran-2,3'-(3H)-naphtha(2,1-b)pyrans)
失效
3-取代的7-二烷基氨基螺(2H-1-苯并吡喃-2,3' - (3H) - 萘(2,1-b)吡喃)
- 专利标题: 3-Substituted- 7-dialkylamino-spiro(2H-1-benzopyran-2,3'-(3H)-naphtha(2,1-b)pyrans)
- 专利标题(中): 3-取代的7-二烷基氨基螺(2H-1-苯并吡喃-2,3' - (3H) - 萘(2,1-b)吡喃)
-
申请号: US313731申请日: 1981-10-22
-
公开(公告)号: US4384094A公开(公告)日: 1983-05-17
- 发明人: John E. Herweh , Thomas B. Garrett , Alan B. Magnusson
- 申请人: John E. Herweh , Thomas B. Garrett , Alan B. Magnusson
- 申请人地址: PA Lancaster
- 专利权人: Armstrong World Industries, Inc.
- 当前专利权人: Armstrong World Industries, Inc.
- 当前专利权人地址: PA Lancaster
- 主分类号: C07D493/10
- IPC分类号: C07D493/10 ; C08F24/00 ; C08F234/02 ; C07D311/96
摘要:
Substituted spiro 2H-1-benzopyran-2,3'-(3H)-naphtho(2,1-b)pyrans particularly suitable for use as precursors to stable colored pyrylium salts are disclosed.
公开/授权文献
信息查询