CAAX-based farnesyltransferase inhibitors contain a thiol functionality. We report that attachment of the 4-imidazolyl group, via 1-, 2-, or 3-carbon alkyl or alkanoyl spacers, to Val-Tic-Met or tLeu-Tic-Gln provides potent FT inhibitors. (R*)-N-[[1,2,3,4-Tetrahydro-2-[N-[2-(1H-imidazol-4-yl)ethyl] -L-valyl]-3-isoquinolinyl]carbonyl]-L-methionine ([imidazol- 4-yl-ethyl]-Val-Tic-Met), with FT IC50 = 0
以前报道的所有基于
CAAX的法呢基转移酶
抑制剂均含有
硫醇官能团。我们报告说,通过1-,2-或3-碳烷基或烷酰基间隔基将4-
咪唑基连接到Val-Tic-Met或tLeu-Tic-Gln提供了有效的FT
抑制剂。(R *)-N-[[[1,2,3,4-四氢-2- [N- [2-(
1H-咪唑-4-基)乙基] -L-戊基] -3-
异喹啉基]羰基] FT IC50 = 0.79 nM的-L-甲
硫氨酸([
咪唑-4-乙基-乙基] -Val-Tic-Met)在没有前药形成的情况下显示出强力的细胞活性(
SAG
EC50 = 3.8μM)。