New Concise and Efficient Synthesis of Rubrolides C and E via Intramolecular Wittig Reaction
作者:Nilesh P. Tale、Amol V. Shelke、Girdharilal B. Tiwari、Prerana B. Thorat、Nandkishor N. Karade
DOI:10.1002/hlca.201100351
日期:2012.5
A short total synthesis of rubrolides C and E has been achieved in four steps, using readily available 4‐methoxyacetophenone, 2‐bromoacetic acid, and the appropriate aromatic aldehyde, in 46 and 45% yield, respectively. Key reactions involved are α‐tosyloxylation of the aryl methyl ketone, intramolecular Wittig reaction, Knoevenagel condensation, and demethylation.
使用容易获得的4-甲氧基苯乙酮,2-溴乙酸和适当的芳族醛,可以通过四个步骤完成卢布罗德C和E的短暂全合成,产率分别为46%和45%。涉及的关键反应是芳基甲基酮的α-甲苯磺酰氧基化,分子内Wittig反应,Knoevenagel缩合和去甲基化。