发明授权
- 专利标题: Process for preparing benzopyran compounds
- 专利标题(中): 制备苯并吡喃化合物的方法
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申请号: US451843申请日: 1995-05-26
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公开(公告)号: US5596103A公开(公告)日: 1997-01-21
- 发明人: Graham Johnson , Neil Smith , Graham R. Geen , Inderjit S. Mann , Vance Novack
- 申请人: Graham Johnson , Neil Smith , Graham R. Geen , Inderjit S. Mann , Vance Novack
- 申请人地址: GB2
- 专利权人: SmithKline Beecham Plc
- 当前专利权人: SmithKline Beecham Plc
- 当前专利权人地址: GB2
- 优先权: GBX9224922 19921127
- 主分类号: C07C233/24
- IPC分类号: C07C233/24 ; C07D311/00 ; C07C257/04 ; C07D20060101 ; C07D257/04 ; C07D405/04 ; C07D407/04
摘要:
This invention comprises a process for preparing benzopyran derivatives represented by formula (I) ##STR1## in which, R.sup.1 is C.sub.1-20 alkyl, C.sub.2-20 alkenyl, C.sub.2-20 alkynyl, or a group of structure (i), (ii) or (iii). ##STR2##
公开/授权文献
- US5026765A Emulsion binder for carpet and carpet tiles 公开/授权日:1991-06-25
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