Cuprate Addition to a 6-Substituted Pentafulvene - Preparation of<i>sec</i>-Alkyl-Substituted Titanocene Dichlorides and Their Biological Activity
作者:Melchior Cini、Tracey D. Bradshaw、William Lewis、Simon Woodward
DOI:10.1002/ejoc.201300474
日期:2013.7
The copper-catalysed (10 mol-% CuBr·SMe2, CuCN·LiCl or CuI/PPh3) addition of RMgBr to the pentafulvene 1-(cyclopenta-2,4-dien-1-ylidenemethyl)-2-methoxybenzene allows the formation of cyclopentadienyl derivatives with α-CHR(2-MeOPh) sidechains (R = Me, Et, nBu, iBu, allyl, Ph) without H– transfer. The deprotonation of these sec-alkyl-substituted cyclopentadienyls followed by the addition of TiCl4 allows
铜催化(10 mol% CuBr·SMe2、CuCN·LiCl 或 CuI/PPh3)将 RMgBr 添加到五富烯 1-(cyclopenta-2,4-dien-1-ylidenemethyl)-2-甲氧基苯中可以形成具有 α-CHR(2-MeOPh) 侧链(R = Me、Et、nBu、iBu、烯丙基、Ph)的环戊二烯基衍生物,没有 H-转移。这些仲烷基取代的环戊二烯基的去质子化,然后加入 TiCl4,可以将 TiCl2η5-C5H4CHR(2-OMePh)} 分离为外消旋/内消旋混合物,显示出对人结肠、乳腺和胰腺细胞系的活性(GI50 2.3–42.4 μM)。