Copper-Catalyzed Synthesis of Enantioenriched Tetraarylethanes
摘要:
Herein we report the asymmetric synthesis of 1,2-dipyridyl-1,2-diarylethanes via an unusual Cu(I)-catalyzed dimerization reaction. Subjection of a variety of enantioenriched substituted 2-pyridyl alcohols to a one-pot protocol generates the desired products in good yields and diastereoselectivities and with ee's up to >99%.
An efficient preparation of chiral 2,2'-bipyridines was developed. Compound 1 was synthesized in 54% yield for three steps starting from 2,6-dibromopyridine. In this synthesis, only catalytic amounts of metals were used in the asymmetric reduction and homo-coupling reaction steps. The total yield and simplicity of experimental procedures were much improved compared with those of the previous report
Copper-Catalyzed Synthesis of Enantioenriched Tetraarylethanes
作者:Wendy S. Jen、Matthew D. Truppo、Deborah Amos、Paul Devine、Michael McNevin、Mirlinda Biba、Kevin R. Campos
DOI:10.1021/ol7027543
日期:2008.3.1
Herein we report the asymmetric synthesis of 1,2-dipyridyl-1,2-diarylethanes via an unusual Cu(I)-catalyzed dimerization reaction. Subjection of a variety of enantioenriched substituted 2-pyridyl alcohols to a one-pot protocol generates the desired products in good yields and diastereoselectivities and with ee's up to >99%.