申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0031909A1
公开(公告)日:1981-07-15
A process for producing 3-oxocyclopentenes which comprises treating a furan-carbinol of the formula:
wherein R is an alkyl group having not more than 6 carbon atoms, an alkenyl group having not more than 6 carbon atoms, an alkynyl group having not more than 6 carbon atoms or a group of the formula
in which R2 is a hydrogen atom, a methyl group or a halogen atom in an aqueous medium in the presence or absence of a catalyst at a pH of 3 to 6.5 to give the corresponding 3-oxocyclopentene of the formula:
wherein R, is as defined above. New 3-oxocyclopentenes of the formula I are provided, wherein R, is pentyl, propargyl, 2-pentynyl, 2-cis-pentenyl, 2-trans-pentenyl or 2,4-cis-pentadienyl.
一种生产 3-氧代环戊烯的工艺,包括处理式中的呋喃-甲醇:
其中 R 是碳原子数不超过 6 个的烷基、碳原子数不超过 6 个的烯基、碳原子数不超过 6 个的炔基或式中的一个基团
其中 R2 为氢原子、甲基或卤原子,在有或无催化剂的水介质中,pH 值为 3 至 6.5,得到相应的式 3-氧代环戊烯:
其中 R 如上定义。提供了式 I 的新 3-氧代环戊烯,其中 R,是戊基、丙炔基、2-戊炔基、2-顺式戊烯基、2-反式戊烯基或 2,4-顺式戊二烯基。