Synthesis of biologically active taxol analogs with modified phenylisoserine side chains
作者:Gunda I. Georg、Zacharia S. Cheruvallath、Richard H. Himes、Magdalena R. Mejillano、Charles T. Burke
DOI:10.1021/jm00100a031
日期:1992.10
the first synthesis and biological evaluation of taxol derivatives with substituted phenyl rings at the C-13 N-benzoyl-(2'R,3'S)-3'-phenylisoserine side chain of taxol (1). Two taxol derivatives were synthesized, one possessing a N-(p-chlorobenzoyl)-(2'R,3'S)-3'-phenylisoserine side chain (2) and the other one a N-benzoyl-(2'R,3'S)-3'-(p-chlorophenyl)isoserine side chain (3). The synthesis of the novel
紫杉酚(1)是一种高效的抗肿瘤药,通过促进细胞中稳定的微管的组装发挥其作用机理。我们正在报道关于紫杉醇的C-13 N-苯甲酰基-(2'R,3'S)-3'-苯基异丝氨酸侧链上带有取代苯环的紫杉醇衍生物的首次合成和生物学评估(1)。合成了两种紫杉醇衍生物,一种具有N-(对氯苯甲酰基)-(2'R,3'S)-3'-苯基异丝氨酸侧链(2),另一种具有N-苯甲酰基-(2'R,3'S) -3'-(对氯苯基)异丝氨酸侧链(3)。通过酯烯酸酯-亚胺环缩合反应的不对称合成3-羟基-4-芳基-2-氮杂环丁酮衍生物,实现了新型苯基异丝氨酸侧链的合成。将2-氮杂环丁酮14和15分别用对氯苯甲酰氯和苯甲酰氯酰化,以形成N-酰基β-内酰胺16和17。随后将16和17偶联到7-(三乙基甲硅烷基)浆果赤霉素III(6)在吡啶和DMAP的存在下,在除去保护基团之后,以优异的产率提供了所需的紫杉醇类似物2和3。在微管蛋白组装测