Studies in nitrosopyrazoles. Part 1. Preparative and spectroscopic studies of some 3,5-dialkyl-4-nitrosopyrazoles
作者:Mailer Cameron、Brian G. Gowenlock、Alan S. F. Boyd
DOI:10.1039/p29960002271
日期:——
The preparations of a number of 3,5-disubstituted- and 1,3,5-trisubstituted-4-nitrosopyrazoles are described and a range of physical properties of these compounds are measured. Comparison is made with some 2,6-disubstituted nitrosobenzenes and it is shown from 13C NMR spectroscopy that the effects of substitution by flanking tert-butyl groups are moderated in the case of the pyrazoles from those in
描述了许多3,5-二取代-和1,3,5-三取代-4-亚硝基吡唑的制备,并测量了这些化合物的一系列物理性质。与某些2,6-二取代的亚硝基苯进行了比较,从13 C NMR光谱显示,在吡唑与芳族C 6环中的吡唑相比,由于叔丁基的影响,缓和了侧翼叔丁基的取代作用。减少空间位阻。还表明,当1,3,5-取代的-4-亚硝基吡唑的NO侧基之一是叔丁基或苯基时,其空间效应是明显的,而在相应的情况下则没有这种效应。异丁基。