Synthesis of 2,6-di(pyrazol-1-yl)-4-bromomethylpyridine, and its conversion to other 2,6-di(pyrazol-1-yl)pyridines substituted at the pyridine ring
作者:Jérôme Elhaïk、Christopher M. Pask、Colin A. Kilner、Malcolm A. Halcrow
DOI:10.1016/j.tet.2006.10.051
日期:2007.1
Two routes to 2,6-di(pyrazol-1-yl)-4-hydroxymethylpyridine (1) from 2,6-dihydroxy-isonicotinic acid, in four and six steps, are reported. Reaction of 1 with 48% HBr yields 2,6-di(pyrazol-1-yl)-4-bromomethylpyridine (2), which is a powerful precursor to a range of new tridentate ligands for transition metals functionalised at the pyridine ring. As a proof of principle, we describe the further elaboration
据报道,在四个和六个步骤中,从2,6-二羟基-异烟酸到2,6-二(吡唑-1-基)-4-羟甲基吡啶(1)的两种途径。的反应1用48%HBr产生2,6-二(吡唑-1-基)-4-溴甲基吡啶(2),这是一个功能强大的前体的范围内的新的三齿配体为在吡啶环官能化的过渡金属。作为原理上的证明,我们描述了2的进一步详述,得到两个带有核碱基取代基的2,6-二(吡唑-1-基)吡啶和背对背配体1,2-bis [2,6 -二(吡唑-1-基)吡啶-4-基]乙烷。介绍了这些新衍生物中的两种的晶体结构。