The syntheses of hydroxyethylsulfonamides, (2S,3R)-tert-butyl N-[4-(N-benzyl-4-R-phenylsulfonamido)-3-
hydroxy-1-phenylbutan-2-yl]carbamates and (5) (2S,3R)-2-amino-4-[N-benzyl-4-R-benzenesulfonamido]-3-hydroxy-1-
phenylbutane hydrochlorides (6), derived from (2S,3S)-Boc-phenylalanine epoxide, are reported. None of the compounds,
containing the Boc group, showed activity against M. tuberculosis ATTC 27294, while compounds 6 did, with the most
active compounds having R = p-Cl, p-Br and p-Me. Results indicate that the presence of a free amino group at C2 and the
sulphonamide moiety are important for biological activity. The antimycobacterial activity of compounds 6 correlated well
with the calculated lipophilicities, but not with the electronic effects of the substituents, R. All compounds 6 were highly
cytotoxic against the hepatoma cell lineage Hep G2 A16. The X-ray crystal structure of compound [(6: R = Me).H2O] is
also reported. In the propeller-like conformation adopted by the cation, the amino and hydroxy groups have a cis arrangement,
and thus are suitably placed to form 5- membered chelates.
报道了从(2S,3S)-Boc-苯丙
氨酸
环氧化物衍生得到的羟乙基磺酰胺的合成,(2S,3R)-叔丁基N-[4-(N-苄基-4-R-苯磺酰胺基)-3-羟基-1-苯基
丁烷-2-基]
氨基甲酸酯(5)和(2S,3R)-2-
氨基-4-[N-苄基-4-R-苯磺酰胺基]-3-羟基-1-苯基
丁烷盐酸盐(6)。含有Boc基团的所有化合物对M. tuberculosis A
TCC 27294均无活性,而化合物6表现出活性,活性最高的化合物R分别为对
氯、对
溴和对甲基。结果表明,C2位的自由
氨基和磺酰胺基团对
生物活性至关重要。化合物6的抗分枝杆菌活性与其计算的亲脂性有很好的相关性,但与取代基R的电子效应无关。所有化合物6对肝癌
细胞系Hep G2
A16均具有高度细胞毒性。还报道了化合物[(6: R = Me).H2O]的X射线晶体结构。在阳离子采取的类似螺旋桨的构象中,
氨基和羟基呈顺式排列,因此适于形成5元螯合物。