Formal synthesis of natural epibatidine and of its enantiomer: Use of radical cyclization in an enantiospecific route
作者:Derrick L.J. Clive、Vince S.C. Yeh
DOI:10.1016/s0040-4039(98)00958-7
日期:1998.7
(S)-Pyroglutamic acid was converted into the (phenylthio)acetylene 14, which undergoes radical cyclization to the 7-azabicyclo[2.2.1]heptane 15. Ozonolysis then affords ketone 4, a synthetic precursor of (−)-epibatidine.
(S)-焦谷氨酸被转化为(苯硫基)乙炔14,其经历自由基环化成7-氮杂双环[2.2.1]庚烷15。然后,臭氧分解得到酮4,酮(4)是(-)-依巴替丁的合成前体。