Overcoming Product Inhibition in Catalysis of the Intramolecular Schmidt Reaction
作者:Hashim F. Motiwala、Charlie Fehl、Sze-Wan Li、Erin Hirt、Patrick Porubsky、Jeffrey Aubé
DOI:10.1021/ja402848c
日期:2013.6.19
carrying out the intramolecular Schmidt reaction of alkyl azides and ketones using a substoichiometric amount of catalyst is reported. Following extensive screening, the use of the strong hydrogen-bond-donating solvent hexafluoro-2-propanol was found to be consistent with low catalyst loadings, which ranged from 2.5 mol % for favorable substrates to 25 mol % for more difficult cases. Reaction optimization
报道了使用亚化学计量量的催化剂进行烷基叠氮化物和酮的分子内施密特反应的方法。经过广泛筛选,发现使用强氢键供体溶剂六氟-2-丙醇与低催化剂负载量一致,其范围从有利底物的 2.5 mol% 到更困难情况的 25 mol%。描述了反应优化、广泛的底物范围和这种改进版反应的初步机理研究。