Very High Chemoselective, Regioselective, and E-Stereoselective 1,3-Chirality Transfer Involving Reaction of Acyclic (E)- and (Z)-γ-Mesyloxy α,β-Enoates and Organocyanocopper-Trifluoroborane Reagents. Efficient Synthetic Routes to Functionalized Chiral α-

Article abstract of DOI:10.1021/ja00195a045

Reaction of γ-mesyloxy (E)- or (Z)-α,β-enoates with Me2Cu(CN)Li2*BF3 (prepared from MeLi-LiI in ether), MeCu(CN)Li*BF3 (prepared from MeLi-LiBr in ether), and RCu(CN)Li*BF3 (R = Et, n-Pr, n-Bu) in tetrahydrofuran or mixed solvents involving tetrahydrofura