Stereospecific rearrangements of optically active 2-aryl-3-ethenyloxiranes to give optically active β-ethenylbenzeneethanols: Benzyl vs. allyl cations and an efficient synthesis of (S)-ibuprofen
作者:Michael E. Jung、Karen L. Anderson
DOI:10.1016/s0040-4039(97)00425-5
日期:1997.4
Rearrangements of aryl- and ethenyl-substituted oxiranes proceed well in the presence of triethylsilane and BF3 to give optically active alcohols, which we have used for a synthesis of (S)-ibuprofen1. We have also shown that a vinyl group migrates to a benzylic cation faster than a phenyl group migrates to an allyl cation.
在三乙基硅烷和BF 3的存在下,芳基和乙烯基取代的肟酮的重排进展顺利,得到了光学活性醇,我们已将其用于合成(S)-布洛芬1。我们还显示,乙烯基迁移到苄基阳离子的速度比苯基迁移到烯丙基阳离子的速度快。