Lithium Hydroxide → 2-[6-phenyl-2-(7H-pyrrolo[2,3-d]pyrimidin-5-yl)-pyrimidin-4-ylamino]-N-(2,2,2-trifluoro-ethyl)-propionamide

Participants

Reaction Conditions

Reaction Steps

As shown in FIG. 3—step i, a mixture of phenylboronic acid (1.22 g), 2,4,6-trichloropyrimidine (compound 1011), tetrakis(triphenylphosphine) palladium(0) and 2N sodium carbonate (15 mL) in DME (25 mL) was heated at 80° C. overnight. After cooling to rt, addition of water (30 mL), extraction with dichloromethane (3×20 mL), drying and evaporation, purification by column chromatography (SiO2, 10-20% ethyl acetate in hexane) afforded the desired product, 6-phenyl-2,4-dichloropyrimidine (compound 1012) (0.544 g). As shown in FIG. 3—step ii, compound 1012 (0.34 g) was mixed with (S)-2-amino-N-(2,2,2-trifluoroethyl)propanamide (0.3 g) and diisopropylethylamine (0.63 mL) in isopropanol (5 mL) and the reaction mixture heated at 80° C. overnight. Evaporation gave a residue, which after aqueous workup and purification (SiO2, 20% ethyl acetate/hexane) produced 2-(2-chloro-6-phenyl-pyrimidin-4-ylamino)-N-(2,2,2-trifluoro-ethyl)propionamide (compound 1013) (0.165 g). As shown in FIG. 3—step iii, compound 1013 (29 mg), 5-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-7-(toluene-4-sulfonyl)-7H-pyrrolo[2,3-d]pyrimidine (compound 1005), PdCl2dppf2 (7 mg), and potassium phosphate (32 mg) were heated in 1,4-dioxane (2 mL) at 80° C. overnight. To the reaction was added aqueous lithium hydroxide solution (2 mL). After heating at 60° C. for 1 h, water (20 mL) was added. Extraction with dichloromethane (3×), drying, evaporation and purification (SiO2, 50-100% ethyl acetate/hexane) gave 3.7 mg of 2-[6-phenyl-2-(7H-pyrrolo[2,3-d]pyrimidin-5-yl)-pyrimidin-4-ylamino]-N-(2,2,2-trifluoro-ethyl)-propionamide (compound 18).

Provenance & Evidence