Propanal → HCID 12135181, compound

Participants

Reaction Steps

To a solution of (1-benzyl-piperidin-4-yl)-(7-methoxy-1,2,3,4-tetrahydro-naphthalen-2-yl)-amine from Step 1 and propionaldehyde (4.5 mL, 62.4 mmol) in dichloroethane (200 mL) under a nitrogen atmosphere was added sodium triacetoxyborohydrde (24 g, 0.113 mol, 2 eq.) in a single portion. The reaction was stirred at room temperature for 24 h then concentrated in vacuo. The residue was partitioned between EtOAc (75 mL) and 5% aq. KOH (50 mL). The aqueous phase was extracted twice more with EtOAc (2×30 mL). The combined organic layers were dried over MgSO4, filtered, and concentrated onto silica (10 g). This was placed on top of a flash column and eluted with 20% hexanes in acetone. The fractions containing product were pooled and concentrated to afford (1-benzyl-piperidin-4-yl)-(7-methoxy-1,2,3,4-tetrahydro-naphthalen-2-yl)-propyl-amine as a clear oil (6.86 g).

Provenance & Evidence