申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0627393A1
公开(公告)日:1994-12-07
A process for the production of a cyclopentenol compound represented by the formula I:
wherein R₁ represents a 2-propenyl group or a 2-propynyl group, which comprises the steps of;
(i) protecting the hydroxyl group of the cyclopentenolone compound II:
wherein R₁ is the same as defined above to give a cyclopentenolone derivative represented by the formula III:
wherein R₁ is the same as defined above and A is a protecting group for a hydroxyl group;
(ii) reacting a mixture of zinc and dibromomethane or diiodomethane in an inert organic solvent with titanium tetrachloride;
(iii) reacting the resulting reaction mixture with a cyclopentenolone derivative III to give a cyclopentenol derivative IV:
wherein R₁ and A are the same as defined above; and
(iv) removing the protecting group A from the cyclopentenol derivative represented by the formula IV to give the cyclopentenol compound I.
一种生产式 I 所代表的环戊烯醇化合物的工艺:
其中 R₁ 代表 2-丙烯基或 2-丙炔基,该工艺包括以下步骤
(i) 保护环戊烯酚化合物 II 的羟基:
其中 R₁ 与上文所定义的相同,从而得到由式 III:
其中 R₁与上文定义相同,A 为羟基的保护基团;
(ii) 在惰性有机溶剂中使锌和二溴甲烷或二碘甲烷的混合物与四氯化钛反应
(iii) 将得到的反应混合物与环戊烯酮衍生物 III 反应,得到环戊烯酮衍生物 IV:
其中 R₁ 和 A 与上文所定义的相同;以及
(iv) 从式 IV 所代表的环戊烯醇衍生物中去除保护基团 A,得到环戊烯醇化合物 I。