Diisopropylethylamine → 5-(3-(3-(3-Chloro-phenyl)-propylamino)-propyl)-thiophene-2-carboxylic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

A solution of 5-(3-amino-propyl)-thiophene-2-carboxylic acid methyl ester (from Preparation 5, Step C, 0.118 g, 0.5 mmol) and N,N-diisopropylethylamine (0.071 g, 0.55 mmol) in 10 mL MeOH was stirred at room temperature for 30 minutes and 3-(3-chloro-phenyl)-propionaldehyde (from Preparations 3, 0.093 g, 0.55 mmol) was added. The mixture was stirred for 90 minutes. The reaction was cooled to 0° C., NaBH4 (30.3 mg, 0.801 mmol) was added and the mixture was stirred for 30 minutes. The reaction was quenched with 1:1 NaHCO3:H2O and was washed with CH2Cl2. The CH2Cl2 extracts were washed with brine, dried over MgSO4, filtered, and concentrated in vacuo to afford the title compound as an oil (171 mg). MS 352 (M+1).

Provenance & Evidence