Sodium Carbonate → HCID 57584981, compound

Participants

Reaction Steps

To a microwave vial equipped with a stir bar was charged with N-(5-bromopyridin-3-yl)-4-methylbenzenesulfonamide (0.180 g, 0.6 mmol) in 1,4-dioxane (3 ml), was added N-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzo[d]thiazol-2-yl)acetamide (0.223 g, 0.7 mmol), Pd FibreCat® (Anchored homogeneous catalyst, Johnson Matthey, West Deptford, N.J.) (0.024 g, 20%) and 2M sodium carbonate (0.7 ml, 1 mmol). The vial was capped and then placed into a CEM Microwave for 10 minutes at 100° C., while 100 watts of energy was supplied via Powermax® (Simultaneous heating while cooling technology). The progress of the reaction was monitored by LC/MS, which showed desired product, N-deacylated material and boronic ester in the mixture. The reaction was stopped at this point, to prevent further de-acylation of product. The mixture was diluted with DCM and saturated sodium bicarbonate solution. The organic layer was collected by extracting with DCM (3×20 ml). Combined organic extracts, dried over sodium sulfate, filtered and concentrated in vacuo. The crude was purified by reverse-phase HPLC. This gave N-(6-(5-(4-methylphenylsulfonamido)pyridin-3-yl)benzo[d]thiazol-2-yl)acetamide (0.016 g, 7% yield) as a white crystalline solid. MS (ESI pos. ion) m/z: 439 (MH+). Calc'd exact mass for C21H18N4O3S2: 438. 1H NMR (400 MHz, DMSO-d6): 2.19 (s, 3H), 2.27 (s, 3H), 7.16 (d, 2H), 7.37 (s, 1H), 7.49 (s, 1H), 7.62 (d, 2H), 7.73 (d, 1H), 7.90 (s, 1H), 7.94 (s, 1H), 8.02 (s, 1H).

Provenance & Evidence