Formation of Optically Pure Cyclic Amines by Intramolecular Conjugate Displacement
摘要:
Intramolecular conjugate displacement (ICD) has been applied to the Morita-Baylis-Hillman adducts formed from (5S)-5-(l-menthyloxy)-2(5H)-furanone and aldehydes that carry a protected beta- or gamma-amino group. DIBAL-H reduction of the resulting ICD products releases optically pure six- or seven-membered cyclic amines having a stereogenic center a to nitrogen.