I<sub>2</sub>-Mediated Oxidative C–O Bond Formation for the Synthesis of 1,3,4-Oxadiazoles from Aldehydes and Hydrazides
作者:Wenquan Yu、Gang Huang、Yueteng Zhang、Hongxu Liu、Lihong Dong、Xuejun Yu、Yujiang Li、Junbiao Chang
DOI:10.1021/jo401751h
日期:2013.10.18
A practical and transition-metal-free oxidative cyclization of acylhydrazones into 1,3,4-oxadiazoles has been developed by employing stoichiometric molecular iodine in the presence of potassium carbonate. The conditions of this cyclization reaction also work well with crude acylhydrazone substrates obtained from the condensation of aldehydes and hydrazides. A series of symmetrical and asymmetrical
通过在碳酸钾存在下使用化学计量的分子碘,已开发出一种实用且无过渡金属的酰基hydr酮成1,3,4-恶二唑的氧化环化反应。该环化反应的条件也适用于由醛和酰肼的缩合得到的粗酰基hydr底物。可以以有效和可扩展的方式方便地生成一系列对称和不对称的2,5-二取代的(芳基,烷基和/或乙烯基)1,3,4-恶二唑。