Application of olefin metathesis to organic synthesis. Syntheses of civetone and macrolides
作者:Jiro Tsuji、Shohei Hashiguchi
DOI:10.1016/0040-4039(80)88007-5
日期:1980.1
by the olefin metathesis reaction catalyzed by WOCl4-Cp2TiMe2. The Dieckmann condensation of this diester using potassium hydride afforded 2-ethoxycarbonylcyclo-9-heptadecenone, which was converted by hydrolysis and decarboxylation to cyclo-9-heptadecenone (civetone) as a mixture of cis and trans isomers (1.3 : 1) in 54% yield. Also 9-octadecen-18-olide was obtained in 17.9% by the metathesis of oleyl
基于WOCl 4 -Cp 2 TiMe 2催化的烯烃复分解反应,基于50%的理论转化率,以87%的产率获得9-十八碳烯-1,18-二辛酸二乙酯。使用氢化钾对该二酯进行狄克曼缩合反应,得到2-乙氧基羰基环-9-庚烯酮,通过水解和脱羧转化为环-9-庚烯酮(西维酮),为顺式和反式异构体(1.3:1)的混合物,含量为54%屈服。通过油酸油酯的复分解,也以17.9%获得9-十八碳烯-18-油酸酯。