发明授权
- 专利标题: Process for the preparation of esters of stilbenedicarboxylic acid
- 专利标题(中): 二苯乙烯二酸酯的制备方法
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申请号: US398841申请日: 1995-03-06
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公开(公告)号: US5470998A公开(公告)日: 1995-11-28
- 发明人: Richard H. S. Wang
- 申请人: Richard H. S. Wang
- 申请人地址: TN Kingsport
- 专利权人: Eastman Chemical Company
- 当前专利权人: Eastman Chemical Company
- 当前专利权人地址: TN Kingsport
- 主分类号: B01J31/02
- IPC分类号: B01J31/02 ; C07B61/00 ; C07C51/363 ; C07C63/70 ; C07C67/343 ; C07C69/76
摘要:
Disclosed is a process for the preparation of 4,4'-stilbenedicarboxylate esters by a 3-step process utilizing p-toluic acid, an alkyl p-formylbenzoate and a trialkyl phosphite. The steps comprise(1) preparing p-(chloromethyl)benzoic acid by chlorinating p-toluic acid with sulfuryl chloride in the presence of a free radical initiator and chlorobenzene or dichlorobenzene;(2) contacting the p-(chloromethyl)benzoic acid of step (1) with a trialkyl phosphite to obtain a phosphonate compound; and(3) contacting the phosphonate ester compound of step (2) with an alkyl p-formylbenzoate in the presence of an alkali metal alkoxide and an inert solvent to obtain the dialkyl 4,4'-stilbenedicarboxylate.
公开/授权文献
- USD327300S Combined game spinner and playing board or similar article 公开/授权日:1992-06-23