Synthesis of naucléfine, angustidine, angustine, and (±)-13b, 14-dihydroangustine
作者:David B. Repke、Jahangir Jahangir、Robin D. Clark、David B. MacLean
DOI:10.1039/c39880000439
日期:——
4-b]indolium trifluoromethanesulphonate reacts with the lithio derivatives of 3-cyano-4-methylpyridines to generate pentacyclic amidines which, upon hydrolysis and oxidation, produce naucléfine, angustine, and angustidine.