Stereoselective Synthesis of Freidinger Lactams Using Oxaziridines Derived from Amino Acids
作者:Michael S. Wolfe、Dinah Dutta、Jeffrey Aubé
DOI:10.1021/jo961670j
日期:1997.2.1
Conformationally restrained dipeptidyl lactams are building blocks for the synthesis of peptidomimetics, including Freidinger lactams (Figure 1). Few synthetic methodologies toward such moieties allow for incorporation of a stereodefined substituent on the ring nitrogen (i.e., corresponding to an amino acid side chain). Enantiopure Freidinger lactams were obtained by (1) condensation of (S)-tert-butoxycarbonyl