Regioselective 1,3-dipolar cycloaddition of nitrilimines to 2-methyl-2-vinyl oxirane
作者:Muhammet Yıldırım、Yaşar Dürüst
DOI:10.1016/j.tet.2011.03.017
日期:2011.5
1,3-Dipolar cycloaddition of in situ generated C,N-diaryl nitrilimines to 2-methyl-2-vinyl oxirane gives rise to the regioselective formation of novel 5-(2-methyloxiranyl)-4,5-dihydropyrazole derivatives in moderate to good yields. The structures and stereochemistries of the new cycloadducts were confirmed by spectroscopic/physical methods including X-ray diffraction data.
原位生成的C,N-二芳基亚硝胺的1,3-偶极环加成反应生成2-甲基-2-乙烯基环氧乙烷,选择性地合成了新的5-(2-甲基环氧乙烷基)-4,5-二氢吡唑衍生物良品率高。通过光谱/物理方法(包括X射线衍射数据)确认了新环加合物的结构和立体化学。