Birch Reduction of (−)-Ephedrine. Formation of a New, Versatile Intermediate for Organic Synthesis
作者:Gury Zvilichovsky、Isra Gbara-Haj-Yahia
DOI:10.1021/jo049726u
日期:2004.8.1
The reduction of (−)-ephedrine by lithium in liquid ammonia resulted in the formation of S-1-(1,4-cyclohexadien-1-yl)-N-methyl-2-propanamine. In addition to the reduction of the aromatic ring, the hydroxy group was reduced as well. The resulting 1,4-cyclohexadienyl group is a potentially versatile intermediate for further synthetic transformations. The ozonolysis of this group was investigated, producing