7-Substituted 2-Azabicyclo[2.2.1]heptanes as Key Intermediates for the Synthesis of Novel Epibatidine Analogues; Synthesis of <i>s</i><i>yn- </i>and <i>a</i><i>nti-</i>Isoepiboxidine
作者:John R. Malpass、Richard White
DOI:10.1021/jo0492564
日期:2004.8.1
Neighboring group participation by the 2-nitrogen in anti-7-bromo-2-benzyl-2-azabicyclo[2.2.1]heptane allows ready nucleophilic substitution at the 7-position by C, N, O, and halogen nucleophiles and opens the way to a range of novel 7-substituted 2-azabicyclo[2.2.1]heptanes. Conversion of an anti-7-ethoxycarbonyl group into a methylisoxazole ring provides anti-isoepiboxidine, a conversion that is
2-氮在抗-7-溴-2-苄基-2-氮杂双环[2.2.1]庚烷中的相邻基团参与使C,N,O和卤素亲核试剂在7位容易被亲核取代,并打开到一系列新型的7-取代的2-氮杂双环[2.2.1]庚烷的方法。一个的转换抗7-乙氧羰基转化成甲基异恶唑环提供抗isoepiboxidine,转换这是可能的,即使没有二次双环氮的保护。成功的碱诱导的差向异构化α为抗-7-乙氧羰基衍生物的羰基,得到顺式立体异构体,因此为顺式异联哌啶。