1,1-bis(1,1-dimethylethoxy)-N,N,N-trimethylamine → HCID 67215697, compound

Participants

Reaction Conditions

Reaction Steps

3.37 ml (14.06 mmol) of N,N-dimethylformamide di(tert-butyl)acetal are added to 570 mg (3.52 mmol) of imidazo[1,5-a]pyridine-6-carboxylic acid [described in Bioorg. Med. Chem. Lett., (2002), 12(3), 465-470] in a mixture of 5 ml of dimethylformamide and 5 ml of toluene and the mixture is heated at 90° C. for 6 hours. 3.37 ml (14.06 mmol) of N,N-dimethylformamide di(tert-butyl)acetal are again added to the reaction medium and the mixture is heated at 90° C. for a further 4 hours. The reaction medium is poured onto water and extracted with ethyl acetate. The organic phase is separated by settling, washed with a saturated aqueous sodium chloride solution, dried over sodium sulfate and concentrated under reduced pressure. The product is purified by filtration through a bed of silica, elution being carried out with a mixture of dichloromethane and methanol (98/2). After evaporation, 580 mg of a beige powder are obtained. Melting point: 77° C.; 1H NMR (d6-DMSO): 1.59 (9H, s), 7.71 (1H, d), 7.36 (1H, s), 7.58 (1H, d), 8.56 (1H, s), 9.03 (1H, s).

Provenance & Evidence