Diastereoselective Intramolecular Friedel–Crafts Alkylation of Tetralins
作者:Clémence Liébert、Marion K. Brinks、Andrew G. Capacci、Matthew J. Fleming、Mark Lautens
DOI:10.1021/ol2008236
日期:2011.6.17
An efficient and versatile synthesis of cis-hexahydrobenzophenanthridines starting from readily available tetralins has been developed using an intramolecular Friedel–Crafts alkylation as a key step. The substrates were prepared via a highly stereocontrolled rhodium-catalyzed ring-opening reaction of meso-oxabicyclic alkenes and a hydrogenation sequence. Thus, a wide variety of complex tetracyclic