作者:Barry S. Orlek、Peter G. Sammes、David J. Weller
DOI:10.1039/c39930001412
日期:——
Examples are given illustrating the use of ortho-substituents on substituted benzene rings as steric buttresses to limit the conformational space available to a dipole and dipolarophile, forcing them into closer proximity and hence to allow cycloadditions to proceed that otherwise do not.
给出的实施例说明了在取代的苯环上使用邻位取代基作为空间支撑,以限制偶极子和亲偶极子可利用的构象空间,迫使它们更接近,从而允许进行环加成反应,否则就不会发生。