[EN] (-)-EPIGALLOCATECHIN GALLATE DERIVATIVES FOR INHIBITING PROTEASOME<br/>[FR] DERIVES (-)-EPIGALLOCATECHINE GALLATES POUR INHIBER LE PROTEASOME
申请人:UNIV HONG KONG POLYTECHNIC
公开号:WO2006017981A1
公开(公告)日:2006-02-23
(-)-EGCG, the most abundant catechin, was found to be chemopreventive and anticancer agent. However, (-)-EGCG has at least one limitation: it gives poor bioavailability. This invention provides compounds of generally formulae below, wherein R11, R12, R13, R21, R22, R2, R3, and R4 are each independently selected from the group consisting of -H, and C1 to C10 acyloxyl group; and R5 is selected from the group consisting of -H, C1 -C10 -alkyl, C2 -C10 -alkenyl, C2 -C10 -alkynyl, C3 -C7 -cycloalkyl, phenyl, benzyl and C3 -C7 -cycloalkenyl, whereas each of the last mentioned 7 groups can be substituted with any combination of one to six halogen atoms; at least one of R11, R12, R13, R21, R22, R2, R3 and R4 is -H, which were found to be more potent than their non-protected counterparts, which can be used as proteasome inhibitors to reduce tumor cell growth.
(-)-EGCG 是最丰富的儿茶素,被发现具有化学预防和抗癌作用。然而,(-)-EGCG 至少存在一个限制:其生物利用度较低。本发明提供了以下一般公式的化合物,其中 R11、R12、R13、R21、R22、R2、R3 和 R4 分别独立地从以下基团中选择:-H 和 C1 至 C10 酰氧基;R5 从以下基团中选择:-H、C1-C10 烷基、C2-C10 烯基、C2-C10 炔基、C3-C7 环烷基、苯基、苄基和 C3-C7 环烯基,而最后提到的 7 个基团中的每一个均可被 1 至 6 个卤素原子的任意组合取代;R11、R12、R13、R21、R22、R2、R3 和 R4 中至少有一个是 -H,这些化合物被发现比其非保护形式的对应物更有效,可用作蛋白酶体抑制剂以减少肿瘤细胞生长。