ammonium cerium(IV) nitrate in acetonitrile T=-45°C; 2 h;

ammonium cerium(IV) nitrate in acetonitrile T=-45°C; 2 h;

1: N-Boc-2-(tributylstannyl)piperidine With n-butyllithium in tetrahydrofuran; hexanes T=-78°C; Inert atmosphere; 2: methyl chloroformate in tetrahydrofuran; hexanes T=-78 - 20°C; Inert atmosphere; optical yield given as percent ee;

1: N-Boc-2-(tributylstannyl)piperidine With n-butyllithium in tetrahydrofuran; hexanes T=-78°C; Inert atmosphere; 2: methyl chloroformate in tetrahydrofuran; hexanes T=-78 - 20°C; Inert atmosphere; optical yield given as percent ee;

1: n-butyllithium; N-Boc-2-(tributylstannyl)piperidine With N,N,N',N,-tetramethylethylenediamine in diethyl ether T=-78°C; 1 h; Inert atmosphere; 2: With C11H21N2O(1-)*Li(1+) in diethyl ether T=-55°C; 4 h; Inert atmosphere; 3: phenyl isocyanate in diethyl ether T=-78°C; Inert atmosphere; Overall yield = 71 percent;

1: N-Boc-2-(tributylstannyl)piperidine With n-butyllithium in tetrahydrofuran; hexanes T=-78°C; Inert atmosphere; 2: dimethyl sulfate in tetrahydrofuran; hexanes T=-78 - 20°C; Inert atmosphere; optical yield given as percent ee;