dicobalt octacarbonyl under CO pressure. The active catalyst, cobalt tetracarbonyl anion, induces nucleophilic ring opening of the heterocycle, resulting in inversion of configuration. The regio- and stereospecificity of this reaction resulted in the synthesis of the first highly strained trans-7-azabicyclo[4-2-0]octan-8-one derivatives.
β-内酰胺是通过在 CO 压力下由八羰基二
钴催化的
氮丙啶羰基化扩环合成的。活性催化剂四
羰基钴阴离子诱导杂环亲核开环,导致构型反转。该反应的区域和立体特异性导致第一个高度紧张的 trans-7-azabicyclo[4-2-0]octan-8-one 衍
生物的合成。