The easily available cycloalkanoyl acetic- and propionic acid esters are transformed to the corresponding amines by standard procedures. These in turn provided an efficient access to cyclic α-aminonitriles, which were reacted with a series of Grignard reagents yielding stereoselectively the cis -configured title compounds; the scope and limitation of this route were investigated. The stereochemical
A Novel Stereoselective Synthesis of cis-Configured Erythrinane and Erythrinane Type Analogues
作者:Eberhard Reimann、Christian Ettmayr
DOI:10.1007/s00706-003-0158-2
日期:2004.8
angularly substituted heterocycles by C2- and C3-units provided appropriate precursors to construct stereoselectively the erythrinanone and several erythrinanone type analogues by intramolecularFriedel-Craftsacylation. The resulting aromatic ketones were catalytically reduced affording the corresponding parent frameworks including the hitherto unknown tetracyclus A-norschelhammerane. On the other