Formaldehyde → HCID 59764587, compound

Participants

Reaction Steps

To a solution of 5-isopropoxy-6-nitro-2-piperidin-4-yl-indan-1-one (Example 1, Step 5) in THF (5 mL) and methanol (5 mL) is added formaldehyde (104.2 uL, 1.39 mmol) and 10 drops of AcOH sequentially. The reaction mixture is stirred at room temperature for 1 h, then sodium cyanoborohydride (175.1 mg, 2.78 mmol) is added in one portion, and the reaction is stirred for an additional 30 min. The reaction is quenched by saturated aqueous NH4Cl and concentrated in vacuo to give an oily residue. This oil is partitioned between EtOAc and brine, the organic extract is dried over Na2SO4, filtered and concentrated under vacuum. Silica gel chromatography (5% MeOH in DCM) affords 5-isopropoxy-2-(1-methyl-piperidin-4-yl)-6-nitro-indan-1-one; MS m/z 333.2 (M+1).

Provenance & Evidence