作者:Biao Jiang、Ming-ming Li、Ping Xing、Zuo-gang Huang
DOI:10.1021/ol400030a
日期:2013.2.15
an 11-steps 7.2% total yield route. The chiral quaternary carbon was efficiently and steroselectively constructed through an intermolecular Pauson–Khand reaction and a Claisen rearrangement reaction with >99% ee; the cyclohexane B was then closed through an aldehyde Friedel–Crafts cyclization. Lastly, the isopropenyl group of ring C was introduced through a Suzuki coupling reaction.
报告了(-)-hamigeran B的简洁高效的形式合成。关键的中间体由3-甲氧基-5-甲基苯基三氟甲烷磺酸酯合成,总产率为11步,为7.2%。通过分子间的Pauson-Khand反应和Claisen重排反应(ee大于99%)可高效,立体选择性地构建手性季碳;然后将环己烷B通过醛Friedel-Crafts环化反应封闭。最后,通过Suzuki偶联反应引入环C的异丙烯基。