Bicyclic tetrahydrofuran lactone derivatives and process for the preparation thereof
申请人:Cho Seo Yong
公开号:US20070010679A1
公开(公告)日:2007-01-11
The present invention relates to bicyclic tetrahydrofuran lactone derivatives of Formula (1) and a preparation method thereof, and particularly it relates to a process of preparing compounds of Formula (1) by performing an intramolecular cyclization of tetrahydrofuran-allenic acid derivatives in the presence of a phenyl halide, a palladium catalyst and a base:
wherein n is 1 or 2, and R is phenyl optionally substituted with C
1
-C
6
alkyl, C
1
-C
6
alkoxy, hydroxyl or C
1
-C
6
hydroxyalkyl group.
本发明涉及公式(1)的双环四氢呋喃内酯衍生物及其制备方法,特别涉及在苯基卤化物、钯催化剂和碱存在下,通过四氢呋喃-炔酸衍生物的分子内环化制备公式(1)化合物的方法:其中n为1或2,R为苯基,可选地取代为C1-C6烷基、C1-C6氧烷基、羟基或C1-C6羟基烷基。