Protecting Group-Free Syntheses of (4S,5S,11R)- and (4S,5S,11S)-iso-Cladospolide B and Their Biological Evaluation
作者:Chada Reddy、Nagavaram Rao、Pombala Sujitha、Chityal Kumar
DOI:10.1055/s-0031-1290986
日期:2012.6
Abstract Short and efficient total syntheses of (4S,5S,11R)- and (4S,5S,11S)-iso-cladospolide B were achieved in five steps each without using any protecting groups. The key steps were an alkyne-zipper reaction, a Suzuki cross coupling, and a Sharpless asymmetric dihydroxylation. The biological activities of both natural products toward various cancer cell lines were tested for the first time. Short and
摘要 (4 S,5 S,11 R)-和(4 S,5 S,11 S)-异cladospolide B的短而有效的全合成反应可通过五个步骤完成,每个步骤均不使用任何保护基。关键步骤是炔烃-拉链反应,Suzuki交叉偶联和Sharpless不对称二羟基化反应。首次测试了两种天然产物对各种癌细胞系的生物活性。 (4 S,5 S,11 R)-和(4 S,5 S,11 S)-异cladospolide B的短而有效的全合成反应可通过五个步骤完成,每个步骤均不使用任何保护基。关键步骤是炔烃-拉链反应,Suzuki交叉偶联和Sharpless不对称二羟基化反应。首次测试了两种天然产物对各种癌细胞系的生物活性。