作者:Braden Kralt、Ryan Moreira、Michael Palmer、Scott D. Taylor
DOI:10.1021/acs.joc.9b01938
日期:2019.9.20
An efficient total synthesis of A54145 factor D (A5D), a member of the A54145 family of cyclic lipodepsipeptide antibiotics, is reported. The peptide was constructed by attaching the peptide to the 2′-chlorotrityl polystyrene resin via Sar5 and developing conditions that avoided diketopiperazine formation upon subsequent elaboration using 9-fluorenylmethoxycarbonyl solid-phase peptide synthesis. This
据报道,A54145因子D(A5D)是环状脂肽肽抗生素A54145家族的成员,可以有效地进行全合成。通过经由Sar5将肽连接至2'-氯三苯甲基聚苯乙烯树脂并开发避免在随后使用9-芴基甲氧基羰基固相肽合成进行精制后形成二酮哌嗪的条件,来构建肽。该途径允许关键的deps键的容易形成。将支链的无环前体从树脂上环化,然后整体脱保护以获得A5D。与其他人的最新研究一致,我们发现MeOAsp残基具有2 S,3 R构型。我们还确定了前isoiso中的立体中心的配置-十一烷酰脂质尾巴不影响生物活性。