1,3-Dipolar cycloadditions of cyclic nitrones to γ-bromo α,β-unsaturated esters and lactones
作者:Pedro de March、Marta Figueredo、Josep Font、Antonio Salgado
DOI:10.1016/s0040-4020(98)00376-7
日期:1998.6
The 1,3-dipolar cycloaddition of cyclic nitrones to several γ-bromo α,β-unsaturated esters and lactones has been studied. All the reactions have shown high stereoselectivity, with a predominance of the endo or exo transition state for the trans or cis dipolarophiles, respectively.
研究了环硝酮与几种γ-溴α,β-不饱和酯和内酯的1,3-偶极环加成反应。所有的反应已经表明高立体选择性,与占优势内切或外切过渡状态为反式或顺式分别dipolarophiles。