More highly mixed, higher order cyanocuprates “RT(2-thienyl)Cu(CN)Li2”. Efficient reagents which promote selective ligand transfer
作者:Bruce H. Lipshutz、Joseph A. Kozlowski、David A. Parker、Sam L. Nguyen、Keith E. McCarthy
DOI:10.1016/0022-328x(85)87388-5
日期:1985.4
forms a new reagent, “RT(2-thienyl)Cu(CN)Li2.” This species selectively transfers the RT ligand in substitution reactions with epoxides and halides. In conjugate addition processes, the cuprate reacts with unhindered substrates, while β,β-disubstituted cases unexpectedly afford products resulting from 1,2-addition of the thiophene group. The prospects for use of these reagents in the synthesis of polyene
有机锂(R T Li)和2-lithiothiophene(2-噻吩基)与CuCN的结合形成了一种新试剂“ R T(2-噻吩基)Cu(CN)Li 2”。该物种在与环氧化物和卤化物的取代反应中选择性转移R T配体。在共轭加成过程中,铜酸盐与不受阻碍的底物反应,而β,β-二取代的情况出乎意料地提供了由噻吩基的1,2-加成产生的产物。讨论了这些试剂在多烯大环内酯类抗生素合成中的应用前景。