Intramolecular cyclopropanation of 3, the substrate having a chiral auxiliary as a linking bridge between a diazo ester and cyclohexene, was found to give the cyclopropane 4 having over 99% diastereomeric excess (d.e.) in 91.5% yield. The reaction was also carried out at 138°C (p-xylene reflux) to give 4 of 88.2% d.e.
                                    发现分子内
环丙烷化3(具有手性助剂作为重氮酯和
环己烯之间的连接桥的底物)以91.5%的产率得到具有超过99%的非对映体过量(de)的
环丙烷4。该反应也在138℃下进行(
对二甲苯回流),得到4的88.2%de