作者:Lutz F. Tietze、Olaf Panknin、Felix Major、Birgit Krewer
DOI:10.1002/chem.200701521
日期:2008.3.17
The synthesis of the novel pentagastrin seco-CBI conjugate 3, which is based on the highly cytotoxic antitumor antibiotic (+)-duocarmycin SA (1), is reported. A key step in the synthesis is the palladium-catalyzed carbonylation of aryl bromide 7 to give the benzyl ester 16, which is transformed into the new seco-CBI derivative 21 bearing a carboxylic acid ester moiety. Subsequent transformation of
据报道,基于高度细胞毒性的抗肿瘤抗生素(+)-多卡霉素SA(1),合成了新的五肽胃泌素seco-CBI共轭物3。合成中的关键步骤是钯催化的芳基溴化物7羰基化反应,生成苄基酯16,该苄基酯16转化为带有羧酸酯部分的新的seco-CBI衍生物21。随后将21转化为活化的酯,然后引入β-丙氨酸和四胃泌素,导致产生新的五肽胃泌素药物3,该药物包含用于靶向表达CCK-B /胃泌素受体的癌细胞的肽部分。