The First Regioselective α-Deprotonation and Functionalization of Allenamides. An Application in Intramolecular Pauson−Khand-Type Cycloadditions
摘要:
The first regioselective alpha-deprotonation and functionalization of electron-deficient allenamines are described here. The acidities of alpha- and gamma-allenic protons of these allenamides are readily differentiated using strong bases, thereby allowing regioselective substitutions at either the alpha- or gamma-allenic position, A specific synthetic application of the novel alpha-substituted allenamides in intramolecular Pauson-Khand-type cycloadditions is also described here.
The First Regioselective α-Deprotonation and Functionalization of Allenamides. An Application in Intramolecular Pauson−Khand-Type Cycloadditions
摘要:
The first regioselective alpha-deprotonation and functionalization of electron-deficient allenamines are described here. The acidities of alpha- and gamma-allenic protons of these allenamides are readily differentiated using strong bases, thereby allowing regioselective substitutions at either the alpha- or gamma-allenic position, A specific synthetic application of the novel alpha-substituted allenamides in intramolecular Pauson-Khand-type cycloadditions is also described here.
The First Regioselective α-Deprotonation and Functionalization of Allenamides. An Application in Intramolecular Pauson−Khand-Type Cycloadditions
作者:Hui Xiong、Richard P. Hsung、Lin-Li Wei、Craig R. Berry、Jason A. Mulder、Benjamin Stockwell
DOI:10.1021/ol000181+
日期:2000.9.1
The first regioselective alpha-deprotonation and functionalization of electron-deficient allenamines are described here. The acidities of alpha- and gamma-allenic protons of these allenamides are readily differentiated using strong bases, thereby allowing regioselective substitutions at either the alpha- or gamma-allenic position, A specific synthetic application of the novel alpha-substituted allenamides in intramolecular Pauson-Khand-type cycloadditions is also described here.