Hydrochloric Acid → HCID 44532110, compound

Participants

Reaction Steps

5-[4-(1-Benzyl-1H-indazol-5-ylamino)-pyrido-[3,4-d]pyrimidin-6-yl]-furan-2-carboxylic acid hydrochloride (0.125 g, 0.25 mmol) and carbonyl diimidazole (0.052 g, 0.33 mmol) were suspended in dry THF (3 ml) under a nitrogen atmosphere and stirred at room temperature for 7 hours. 2-(Methanesulphonyl)ethylamine hydrochloride (0.080 g, 0.50 mmol) and triethylamine (0.15 ml, 0.11 g, 1.08 mmol) were added, together with further THF (2 ml), and the resulting mixture was stirred at room temperature for 18 hours. The mixture was absorbed onto silica gel and purified by column chromatography, eluting with 2-10% MeOH/DCM. Concentration of the relevant fractions gave a pale yellow solid. This was resuspended in methanol and treated with ethanolic HCl to give the product as an orange solid, which was collected by filtration, washed with methanol, acetone and ether, and dried in vacuo (0.093 g, 0.154 mmol, 61%); δH [2H6]DMSO 12.00(1H,s), 9.76(1H,s), 9.19-9.29 (2H,m), 8.75 (1H,s), 8.28 (1H,s), 8.22 (1H,s), 7.78-7.90 (2H,m), 7.23-7.38 (7H,m), 5.71 (2H,s), 3.50-3.90 (2H obscured by water signal), 3.48 (2H,t), 3.07 (3H,s); m/z (M+1+) 568.

Provenance & Evidence