A Formal Synthesis of the C1−C9 Fragment of Amphidinolide C Employing the Tamaru Reaction
作者:Mahesh P. Paudyal、Nigam P. Rath、Christopher D. Spilling
DOI:10.1021/ol100959a
日期:2010.7.2
Homoallylation of aldehydes with isoprene and triethylborane catalyzed by Ni(acac)2 gave hydroxyalkenes in good yield with excellent regio- and stereoselectivity. Cross metathesis of the hydroxyalkenes with methyl acrylate using second-generation Grubbs catalyst and copper(I) iodide afforded α,β-unsaturated esters, which underwent cyclization in the presence of DBU to produce tetrahydrofurans with
在Ni(acac) 2催化下,醛与异戊二烯和三乙基硼烷的均烯丙基化得到羟基烯烃,收率良好,具有出色的区域选择性和立体选择性。使用第二代 Grubbs 催化剂和碘化铜 (I) 将羟基烯烃与丙烯酸甲酯交叉复分解,得到 α,β-不饱和酯,在 DBU 存在下进行环化,生成具有正确 C1-C9 片段相对构型的四氢呋喃amphidinolides C、C2 和 F。