New multicomponent cyclization: domino synthesis of pentasubstituted pyridines under solvent-free conditions
作者:Bo Jiang、Xiang Wang、Feng Shi、Shu-Jiang Tu、Guigen Li
DOI:10.1039/c0ob01258k
日期:——
An efficient methodology for the synthesis of highly functionalized pyridine derivatives starting from readily available common reactants has been developed under microwave irradiation and solvent-free conditions. The new domino reaction enables successful assembly of five new σ bonds including two C–N bonds in a one-pot operation. A new mechanism has been proposed, which involves a novel reaction and sequence consisting of deprotonation–imine formation–anionic carbonyl addition.
在微波辐射和无溶剂条件下,已经开发了一种高效的方法,能够从 readily available 的常见反应物合成高度功能化的吡啶衍生物。这种新的多重反应使得在一个反应过程中成功形成五个新的σ键,包括两个C–N键。提出了一种新的机制,涉及一种新反应及其序列,包括去质子化、亚胺形成和阴离子羰基加成。