作者:Sk.Asrof Ali、Javaid H. Khan、Mohammed I.M. Wazeer、Herman P. Perzanowski
DOI:10.1016/s0040-4020(01)89124-9
日期:1989.1
A comparative study of the stereochemical behaviour of the 1,3-dipolar cycloaddition of a series of 1,2-disubstituted alkenes with 1-pyrroline 1-oxide (1) and 2,3,4,5-tetrahydropyridine 1-oxide (2) has been carried out. Both the nitrones exhibit very similar stereochemical properties. Rate constants for the cycloaddition of these nitrones to several disubstituted alkenes have been determinded at 36°C
一系列1,2-二取代烯烃与1-吡咯啉1-氧化物(1)和2,3,4,5-四氢吡啶1-氧化物(2)的1,3-偶极环加成反应的立体化学行为的比较研究)已执行。两种硝酮均显示出非常相似的立体化学性质。通过1 H nmr光谱测定了这些硝酮环加成到几种双取代烯烃上的速率常数。已经发现,由于在涉及1的过渡态中键合蚀变应变的存在,硝酮1的反应比2的反应慢。