Nitrogen → (S)-Tetrahydrofuran-3-yl (3-aminobenzyl)carbamate

Beteiligte Stoffe

Reaktionsschritte

Charged 15 g of (S)-tetrahydrofuran-3-yl 3-nitrobenzylcarbamate 2c in 120 ml EtOAc to a 1 L Parr bomb at room temperature under a blanket of N2. The agitator was started and the vessel pressurized with N2 to 0.75 bar, then the pressure was released. This procedure was repeated 3 times, then the agitator was stopped before adding 0.225 g of 5% Pd/C. The agitator was started, the vessel pressurized with N2 to 0.75 bar, then the pressure was released. This procedure was repeated 3 times, then the agitator was stopped. The vessel was pressurized with H2 to 2 bar, then the pressure was released. This procedure was repeated 3 times, then the vessel was pressurized with H2 to 6.75 bar. The agitator was started and the suspension stirred until complete conversion was evident by HPLC. The H2 pressure was released, the vessel re-pressurized with N2 to 0.75 bar, then the pressure was released. This procedure was repeated 3 times then the agitator was stopped, the reaction mixture filtered through celite and the filter cake rinsed with 30 ml EtOAc to give crude (S)-tetrahydrofuran-3-yl 3-aminobenzylcarbamate 2d as a solution in EtOAc that was used as is immediately in the next step.

Herkunft & Nachweise