A novel synthesis of imidazoles via the cycloaddition of nitrile ylides to their imidoyl chloride precursors
作者:Paul W. Groundwater、Ian Garnett、Andrew J. Morton、Toqir Sharif、Simon J. Coles、Michael B. Hursthouse、Miklos Nyerges、Rosaleen J. Anderson、David Bendell、Alexander McKillop、Weimin Zhang
DOI:10.1039/b104130b
日期:2001.11.1
Generation of nitrile ylides, 4 and 22, via the base-catalysed 1,3-dehydrochlorination of imidoyl chlorides, 3 and 21, gives the imidazoles, 13, 23 and 24. These imidazoles are formed by the cycloaddition of the nitrile ylides, 4 and 22, to their precursor imidoyl chlorides, 3 and 21, and the observed regiochemistry of this cycloaddition has been rationalised by energy calculations on the frontier molecular orbitals of these reactants using semi-empirical (MOPAC PM3) methods.
通过碱催化下亚胺氯3和21的1,3-脱氯化氢反应生成腈叶立德4和22,进而得到咪唑13、23和24。这些咪唑是由腈叶立德4和22与它们的前体亚胺氯3和21进行环加成反应形成的,而这种环加成的区域化学性质已通过使用半经验(MOPAC PM3)方法对这些反应物的前沿分子轨道进行能量计算来合理化解释。