作者:Erin N. Morris、E. Katherine Nenninger、Robert D. Pike、Jonathan R. Scheerer
DOI:10.1021/ol201768f
日期:2011.8.19
Preparation of a chiral, nonracemic 2,5-diketopiperazine diene has enabled the investigation of intermolecular hetero-Diels–Alder cycloadditions. The diketopiperazine diene is reactive with both electron-rich and -deficient alkene substrates. Diastereofacial control in the cycloaddition is enforced with a removable aminal substituent. This study partly illuminates the regiochemical, stereoelectronic
制备手性的,非外消旋的2,5-二酮哌嗪二烯可以研究分子间的杂Diels-Alder环加成反应。二酮哌嗪二烯可与富电子和贫烯烃的底物发生反应。环加成中的非对面控制是通过可移动的氨基取代基进行的。这项研究部分阐明了二酮哌嗪环加成反应的区域化学,立体电子学和反应性偏好,并提供了直接的非对映选择性合成途径生成双环[2.2.2]二氮辛烷结构。