Substitution- and Elimination-Free Phosphorylation of Functionalized Alcohols Catalyzed by Oxidomolybdenum Tetrachloride
作者:Cheng-Yuan Liu、Vijay D. Pawar、Jun-Qi Kao、Chien-Tien Chen
DOI:10.1002/adsc.200900279
日期:2010.1.4
the tested alcohols, oxidomolybdenum tetrachloride (MoOCl4) was found to be the most efficient with a negligible background reaction mediated by triethylamine (Et3N). The new catalytic protocol can be applied to the chemoselective phosphorylations of primary, secondary and tertiary alcohols as well as the substitution‐free phosphorylations of allylic, propargylic, and benzylic alcohols. Functionalized
在检查的14种氧化金属中,被催化的醇催化磷酸化后,四氯化氧化钼(MoOCl 4)在由三乙胺(Et 3 N)介导的可忽略的背景反应中被认为是最有效的。新的催化方案可应用于伯,仲和叔醇的化学选择性磷酸化,以及烯丙基,炔丙基和苄基醇的无取代磷酸化。带有丙酮化物,四氢吡喃基醚,叔丁基的官能化醇叔丁基二甲基甲硅烷基醚或酯基也适用于新的催化方案。最困难的情况涉及1-苯基乙醇和1-(2-萘基)乙醇的无取代磷酸化,分别可以达到95%和90%的收率。反应进展的ESI-MS,IR,1 H和31 P NMR光谱分析表明,烷氧基氧化钼三氯化物-三乙胺加合物如[(RO)Mo(O)Cl 3 -Et 3 N]的中间体催化周转。