Both the Strecker and Bucherer–Bergs reactions convert the norbornane keto ester methyl bicyclo[2.2.1]hept-6-one-2-endo-carboxylate into the lactam 6-endo-aminobicyclo[2.2.1]heptane-2-endo-carboxylic acid-γ-lactam-6-exo-carboxylic acid. This lactam is unusually stable and cannot be hydrolyzed to the corresponding amino acid. The stereochemistry in the Strecker reaction, in which the amino group is
Strecker 和 Bucherer-Bergs 反应均将降
冰片烷
酮酯甲酯双环[2.2.1]hept-6-one-2-endo-carboxylate 转化为内酰胺 6-endo-aminobicyclo[2.2.1]heptane-2-endo-carboxylate
羧酸-γ-内酰胺-6-外-
羧酸。这种内酰胺异常稳定,不能
水解成相应的
氨基酸。Strecker 反应中的立体
化学(其中
氨基为内基)与文献先例所预期的相反。Bucherer-Bergs 反应中的立体
化学,其中
氨基也是 endo,已通过中间体螺乙内酰
脲 (±)-bicyclo[2.2.1]heptane-2-endo-carboxy acid- 的 X 射线晶体学分析得到证实。 6-螺-5'-乙内酰
脲。