synthesized by the fluoride ion-mediated reaction of [60]fullerene with 2-bromoenol silyl ethers, which were easily prepared by 2-bromination of the corresponding enol silyl ethers. The reactivity differed significantly depending on the stability of the 2-bromoenol silyl ethers. High yield and selectivity were achieved for the reaction of 2-bromoenol trimethylsilyl ethers under mild conditions (KF/18-crown-6-ether)
Treatment of silyl enol ethers of various carbonylcompounds with Et2Zn and fluoroalkyl halides (Rf–X) in the presence of RhCl(PPh3)3 in DME gave the corresponding α-Rf carbonylcompounds. A highlyreactive alkyl-rhodium complex which was derived from RhCl(PPh3)3 and Et2Zn must be crucial in this reaction by accelerating the reaction rate and improving the yields dramatically. This reaction overcomes
在RhME(PPh 3)3存在下,在DME中用Et 2 Zn和氟代烷基卤化物(R f –X)处理各种羰基化合物的甲硅烷基烯醇醚,得到相应的α- Rf羰基化合物。衍生自RhCl(PPh 3)3和Et 2 Zn的高反应性烷基铑络合物必须通过加快反应速率和显着提高产率来在该反应中发挥关键作用。该反应克服了由于R f –X的反极化而在合成α- Rf羰基化合物时遇到的困难。