Novel Cryptophycin Antitumor Agents: Synthesis and Cytotoxicity of Fragment “B” Analogues
作者:Vinod F. Patel、Sherri L. Andis、Joseph H. Kennedy、James E. Ray、Richard M. Schultz
DOI:10.1021/jm980706s
日期:1999.7.1
synthetic approach to novel cryptophycin analogues 6 is described. N-Hydroxysuccinimide active ester 15, a key common intermediate, was converted to beta-epoxide 6 in three steps, via initial coupling with unprotected amino acid 9, followed by deprotection/macrolactamization of acyclic precursor 16, and final oxidation of styrene 7 to install the C7-C8 beta-epoxide. Cryptophycin styrenes 7 and beta-epoxides
描述了新型隐藻霉素类似物6的通用合成方法。通过与未保护的氨基酸9进行初始偶联,然后将无环前体16脱保护/大分子内酰胺化,最后将苯乙烯7氧化,以三步法将关键的常见中间体N-羟基琥珀酰亚胺活性酯15转化为β-环氧化物6。 C7-C8β-环氧化物。评价了在片段“ B”中带有不同侧链的隐藻霉素苯乙烯7和β-环氧化物6的细胞毒活性。一般而言,β-环氧化合物6比相应的α-环氧化合物17和苯乙烯7更有效。β-环氧化合物6u具有3-Cl,4-(二甲基氨基),具有较强的活性,而苄基侧链是有效活性所必需的。苄基部分,是制备的最有效的细胞毒剂,IC(50)= 54 pM,