Synthesis of 3-Azabicyclo[3.2.0]heptane Derivatives as γ-Aminobutyric Acid Analogues through Intermolecular [2+2] Photocycloaddition
作者:Susanne Petz、Klaus T. Wanner
DOI:10.1002/ejoc.201201723
日期:2013.7
The synthesis of 3-azabicyclo[3.2.0]heptane-6-carboxylic acid and 7-substituted derivatives was developed as bicyclic analogues of γ-aminobutyric acid. A sensitized, intermolecular [2+2] photocycloaddition of maleic anhydride with N-protected 3-pyrroline served as the key step in these syntheses. Upon transformation of the anhydride function of the primary cycloaddition product, 6-monosubstituted and
3-氮杂双环[3.2.0]庚烷-6-羧酸和7-取代衍生物的合成被开发为γ-氨基丁酸的双环类似物。马来酸酐与 N 保护的 3-吡咯啉的敏化、分子间 [2+2] 光环加成反应是这些合成中的关键步骤。在转化初级环加成产物的酸酐官能团后,获得了 6-单取代和 6,7-二取代的 3-氮杂双环 [3.2.0] 庚烷衍生物。