Total Synthesis of the Sensitive Triyne Natural Product (4<i>S</i>,5<i>S</i>)-4,8-Dihydroxy-3,4-dihydrovernoniyne and All of Its Stereoisomers
作者:Gujjula V. Ramakrishna、Rodney A. Fernandes
DOI:10.1021/acs.orglett.9b01897
日期:2019.8.2
An efficient total synthesis of the revised structure of the sensitive triyne natural product, (4S,5S)-4,8-dihydroxy-3,4-dihydrovernoniyne, and all of its stereoisomers, that is, the previously proposed (4S,5R), (4R,5R), and (4R,5S), has been accomplished from chiral pool compounds l-mannonic-γ-lactone and d-glucono-δ-lactone. The key features involve a one-pot conversion of the chiral pool compounds
敏感的三炔天然产物(4 S,5 S)-4,8-二羟基-3,4-二氢过壬二炔及其所有立体异构体(即先前提出的(4 S,5 R),(4 R,5 R)和(4 R,5 S)已由手性库化合物1 -mannonic-γ-内酯和d-葡萄糖酸-δ-内酯。主要特征包括手性池化合物一锅转化为γ-乙烯基-β-羟基-γ-内酯,杂原子定向的Wacker氧化,Seyferth-Gilbert反应和Cadiot-Chodkiewicz偶联。该合成还涉及最少的保护基团(仅叔丁基二甲基甲硅烷基),并以七至八步完成。