Enantioselective synthesis of chiral phosphonylated 2,3-dihydrofurans by copper catalyzed asymmetric formal [3+2] cycloaddition of propargylic esters with β-keto phosphonates
作者:Xiushuai Chen、Chuanjin Hou、Qing Li、Yanjun Liu、Ruifeng Yang、Xiangping Hu
DOI:10.1016/s1872-2067(16)62488-9
日期:2016.8
Copper catalyzed asymmetric formal [3+2] cycloaddition of propargylic esters to β-keto phosphonates for the synthesis of chiral phosphonylated 2,3-dihydrofurans was developed. By using a bulky and structurally rigid tridentate ketimine P,N,N ligand, a series of optically active phosphonylated 2,3-dihydrofurans were prepared in high yield and up to 92% ee.
开发了铜催化炔丙酯与 β-酮膦酸酯的不对称形式 [3+2] 环加成反应,用于合成手性膦酰化 2,3-二氢呋喃。通过使用庞大且结构刚性的三齿酮亚胺 P,N,N 配体,以高产率和高达 92% 的 ee 制备了一系列具有光学活性的膦酰化 2,3-二氢呋喃。