Copper(I)-Catalyzed Enantioselective 1,6-Borylation of α,β,γ,δ-Unsaturated Phosphonates
作者:Hyesu Lee、Jaesook Yun
DOI:10.1021/acs.orglett.8b03532
日期:2018.12.21
Copper(I)-catalyzed asymmetric 1,6-borylation of 1,3-dienylphosphonates was achieved using (S,S)-Ph-BPE as a chiral ligand. Regio-, stereo-, and enantioselective borylation successfully proceeded to afford phosphonate-containing allylboronates, with high enantioselectivity up to 97% ee. Further applications of the resulting products generated a valuable phosphonate analogue of γ-butyrolactone.
使用(S,S)-Ph-BPE作为手性配体,得到铜(I)催化的1,3-二烯基膦酸酯的不对称1,6-硼酸酯化。区域,立体和对映体选择性硼化成功地进行,得到了含膦酸酯的烯丙基硼酸酯,具有高达97%ee的高对映体选择性。所得产物的进一步应用产生了有价值的γ-丁内酯的膦酸酯类似物。