1,3-dimethyl-1H-pyrazol-4-amine → 2-({5-Chloro-2-[(1,3-dimethyl-1H-pyrazol-4-yl)-amino]-4-pyridinyl}amino)-N-(methyloxy)benzamide

Participants

Reaction Conditions

Reaction Steps

2-(2,5-dichloropyridin-4-ylamino)-N-methoxybenzamide (250 mg, 0.80 mmol), 1,3-dimethyl-1H-pyrazol-4-amine (134 mg, 1.20 mmol), Sodium tert-butoxide (115 mg, 1.20 mmol), 9,9-Dimethyl-4,5-bis(diphenylphosphino)xanthene (55.6 mg, 0.10 mmol) and BIS(DIBENZYLIDENEACETONE)DIPALLADIUM(0) (58.7 mg, 0.06 mmol) were suspended in dioxane (15 mL) and sealed into a microwave tube. The reaction was heated to 150 °C for 30 minutes in the microwave reactor and cooled to RT. Reaction not complete by LCMS so more 9,9-Dimethyl-4,5-bis(diphenylphosphino)xanthene (55.6 mg, 0.10 mmol), BIS(DIBENZYLIDENEACETONE)DIPALLADIUM(0) (58.7 mg, 0.06 mmol) and 1,3-dimethyl-1H-pyrazol-4-amine (134 mg, 1.20 mmol) were added and the reaction heated to 150 ºC for a further 30 minutes in the microwave reactor and cooled to RT. The crude product was purified by ion exchange chromatography, using an SCX column. The desired product was eluted from the column using 7M NH3/MeOH and pure fractions were evaporated to dryness to afford crude product as a tan gum. The sample was given to the purification group for purification by preparative HPLC. Fractions containing the desired compound were evaporated to dryness to afford 2-(5-chloro-2-(1,3-dimethyl-1H-pyrazol-4-ylamino)pyridin-4-ylamino)-N-methoxybenzamide (44.3 mg, 14.30 %) as a tan solid.

Provenance & Evidence