1,3-Dipolar cycloaddition of nitrile oxides with unsymmetrically substituted norbornenes
作者:Peter Mayo、Tiffany Hecnar、William Tam
DOI:10.1016/s0040-4020(01)00573-7
日期:2001.7
1,3-Dipolar cycloadditions of nitrile oxides with unsymmetrically substituted norbornenes were investigated. The cycloadditions were found to be completely stereoselective, giving only the exo cycloadducts in moderate to good yields. Regioselectivities in the cycloadditions ranging from 50:50 to 100:0 were observed with various unsymmetrically substituted norbornenes.
研究了不对称取代的降冰片烯与腈类化合物的1,3-偶极环加成反应。发现环加成物是完全立体选择性的,仅以中等至良好的收率给出外切环加成物。用各种不对称取代的降冰片烯观察到在50:50至100:0范围内的环加成物中的区域选择性。