Chromium Vinylidene Carbenoids: Generation, Characterization, and Reactivity. First Evidence for an Internal Proton Return Phenomenon with Vinylidene Carbenoids
作者:Rachid Baati、D. K. Barma、J. R. Falck、C. Mioskowski
DOI:10.1021/ja016515n
日期:2001.9.1
Preparation of (<i>Z</i>)-1-Halo-1-alkenes and (<i>Z</i>)-1-Halo-2-alkoxy-1-alkenes Using Cr(II/III) and Fe(0)
Reduction of 1,1,1-trihaloalkanes by Cr(II) or Cr(III) regenerated by Fe(0) in moist tetrahydrofuran at room temperature stereoselectively generates (Z)-1-halo-1-alkenes and (Z)-1-halo-2-alkoxy-1-alkenes in good to excellent yields.
Mild, room temperature CrCl2 reduction of 1,1,1-trichloroalkanes stereoselectively generates (Z)-1-chloro-2-substituted-1-alkenes in excellent yields. (C) 2002 Elsevier Science Ltd. All rights reserved.