Pd(II)-Catalyzed Asymmetric Fluorination of α-Aryl-α-cyanophosphonates with the Aid of 2,6-Lutidine
作者:Mikiko Sodeoka、Ken-ichi Moriya、Yoshitaka Hamashima
DOI:10.1055/s-2007-977437
日期:2007.4
Pd(ll)-bisphosphine complexes. While metal complexes failed to promote the reaction alone, a reaction system involving Pd(II) and organic base such as 2,6-lutidine was developed. The Pd (II) complex activates the substrates through coordination of the nitrile group, and 2,6-lutidine abstracts an acidic proton, thereby affording the desired fluorinated products in good yields with up to 78% ee. The products may be useful
我们在此描述了使用手性 Pd(II)-双膦配合物对 α-氰基膦酸酯进行催化不对称氟化。虽然金属配合物不能单独促进反应,但开发了一种涉及 Pd(II) 和有机碱(如 2,6-二甲基吡啶)的反应体系。Pd (II) 配合物通过腈基团的配位激活底物,2,6-二甲基吡啶提取酸性质子,从而以良好的收率提供所需的氟化产物,ee 高达 78%。该产品可用作药物化学中的新型生理磷酸盐模拟物。