catalyzed decomposition of vinyldiazoacetates in the presence of N-phenoxycarbonyl protected 1,2-dihydropyridines or 1-methyl-2-pyridones is a direct method for the construction of the 6-azabicyclo[3.2.2]nonane ring system. The [3 + 4] cycloaddition occurs by a tandem cyclopropanation/Cope rearrangement. Asymmetric induction is possible in these transformations either by using (S)-lactate methyl ester
在N-苯氧羰基保护的1,2-
二氢吡啶或
1-甲基-2-吡啶酮的存在下,四
羧酸二
丙酯催化的重氮
乙酸乙烯酯的分解是构建6-
氮杂双环[3.2.2]
壬烷环系统的直接方法。[3 + 4]环加成反应是通过串联
环丙烷化/ Cope重排而发生的。通过使用(S)-
乳酸甲酯作为手性助剂或四脯
氨酸二
吡啶鎓作为手性催化剂,在这些转化中可能发生不对称诱导。