Tandem acylation — cycloalkylation with cyclohexene l-acetic acid: A new entry to aporphine alkaloids
作者:M.M.V Ramana、Prashant V Potnis
DOI:10.1016/0040-4039(96)00104-9
日期:1996.3
Tandem Acylation-Cycloalkylation of 3,4-dimethoxy phenylethylamine (1) with cyclohexene-1-acetic acid (2) in polyphosphoric acid (PPA) afforded 8-(2-aminoethyl)-1,2,3,4,4a,10a-hexahydro-9-oxo-phenanthrene (3) which on cyclisation followed by dehydrogenation with PdC afforded dehydronornuciferine (5). Hydrogenation of 5 yielded (±) N-nornuciferine (6).