作者:Barry B. Snider、Natalie A. Hawryluk
DOI:10.1021/ol0069756
日期:2001.2.1
[reaction: see text] A 12-step synthesis of 26, the functionalized hydroazulenone ring of guanacastepene (1), has been completed using the EtAlCl(2)-initiated cyclization of gamma,delta-unsaturated ketone 13 to construct 2,2,3-trisubstituted cyclopentanone 14, the palladium-catalyzed coupling of vinylmagnesium bromide with enol triflate 17 to prepare triene 21, and olefin metathesis of triene 21 to
[反应:请参阅文字]使用EtAlCl(2)引发的γ-δ-不饱和酮13环化反应,以构建2,2,26,完成了十二步合成26,即功能化的瓜纳卡斯汀(1)的氢氮烯酮环。 3-三取代的环戊酮14,乙烯基溴化镁与三氟甲磺酸烯醇酯17的钯催化偶合以制备三烯21,以及三烯21的烯烃复分解反应形成关键的水腈20。