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.
Asymmetric synthesis of carbocycles: use of intramolecular conjugate displacement
作者:Dinesh T. Sreedharan、Derrick L. J. Clive
DOI:10.1039/c3ob40115d
日期:——
Intramolecularconjugatedisplacement (ICD), the process illustrated in eqn (1), has been applied to the Morita–Baylis–Hillman adducts formed from (5S)-5-(L-menthyloxy)-2(5H)-furanone and aldehydes that are substituted in the γ- or δ-position by geminal phenylthio groups. When the initial Morita–Baylis–Hillman alcohols are acetylated and oxidized to geminal sulfones, deprotonation causes ring closure
Formation of Optically Pure Cyclic Amines by Intramolecular Conjugate Displacement
作者:Ping Cheng、Derrick L. J. Clive
DOI:10.1021/jo3001657
日期:2012.4.6
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.