lithium aluminium tetrahydride in diethyl ether

diisobutylaluminium hydride in hexane; toluene T=-78°C;

1: With 2,2,6,6-tetramethylpiperidinyl-lithium; sec.-butyllithium; lithium hexamethyldisilazane; n-butyllithium in tetrahydrofuran; hexane T=-78 - -20°C; Kowalski homologation; 2: With hydrogenchloride in tetrahydrofuran; methanol; hexane T=0°C;

sodium tetrahydroborate in methanol; ethylene glycol dimethyl ether T=80°C; Inert atmosphere;

1: (+/-) methyl N-tert-butyloxycarbonyl 2-piperidinecarboxylate With lithium hexamethyldisilazane in tetrahydrofuran T=-78°C; 2: methyl iodide in tetrahydrofuran