The 1,3-dipolar cycloaddition of sugar ketonitrones is a useful synthetic procedure to build up nitrogenated quaternary centers in terms of scope (substrate, dipolarophile, inter- and intramolecular versions), yield, and regio- and stereoselectivity. The hybrid ONIOM (B3LYP/6-31G(d):AM1) theoretical method followed by single-point energy calculations at the B3LYP/6-31G(d) level adequately perform to
糖酮硝酮的1,3-偶极环加成反应是一种有用的合成方法,可建立范围,底物,偶极亲和性,分子间和分子内形式,面积以及区域和立体选择性的硝化季
铵盐中心。混合ONIOM(B3LYP / 6-31G(d):
AM1)理论方法,然后在B3LYP / 6-31G(d)一级进行单点能量计算,足以为常用的相对较大的酮糖前体建模。