与乙酸苄酯不同,偕二乙酸苄酯的化学性质很少在金属催化下进行研究。在这里,我们描述了第一个钯催化的苄基宝石二乙酸酯的级联环烯丙基烷基化,以获得(杂)芳烃稠合苯并[ f ]色烯的复杂类似物,这在药物化学和材料科学中具有相关性。这一合成壮举是通过在中性条件下容易获得的(杂)芳基偕二乙酸酯和容易获得的2-萘酚的正式[3+3]杂环化来实现的。还进行了详细的机制研究和综合阐述。
C17,20-lyase inhibitors. Part 2: Design, synthesis and structure–activity relationships of (2-naphthylmethyl)-1H-imidazoles as novel C17,20-lyase inhibitors
摘要:
A series of 1- and 4-(2-naphthylmethyl)-1H-imidazoles (3 and 4) has been synthesized and evaluated as C-17,C-20-lyase inhibitors. Several 6-methoxynaphthyl derivatives showed potent C-17,C-20-lyase inhibition, suppression of testosterone biosynthesis in rats and reduction in the weight of prostate and seminal vesicles in rats, whereas most of these compounds increased the liver weight after consecutive administrations. The effect on the liver weight was removed by incorporation of a hydroxy group and an isopropyl group at the methylene bridge, as seen in (S)-28d and (S)-42. Selectivity for C-17,C-20-lyase over 11beta-hydroxylase is also discussed, and (S)-42 was found to be a more than 260-fold selective inhibitor. Furthermore, (S)-42 showed a potent suppression of testosterone biosynthesis after a single oral administration in monkeys. These data suggest that (S)-42 may be a promising agent for the treatment of androgen-dependent prostate cancer. (C) 2004 Elsevier Ltd. All rights reserved.