Sodium Bicarbonate → HCID 58380744, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 519 mg of 2,4-dichloronicotinonitrile in 25.5 ml of dioxane are added 782 mg of (4-boc-aminophenyl)boronic acid, 693 mg of sodium bicarbonate in 8.5 ml of water and 347 mg of tetrakis(triphenyl-phosphine)palladium. The suspension is stirred at 100° C. for 2 hours under argon. After cooling, the reaction mixture is poured into water and extracted three times with a 90/10 ethyl acetate/methanol solution. The combined organic phases are dried over magnesium sulfate and concentrated under reduced pressure. 1.58 g of crude product are chromatographed on a prepacked Biotage KP-Sil column of 60 Å SiO2 32-63 μm (from 0.5/99.5 to 1/99 gradient of solution A in dichloromethane; solution A=38/17/2 dichloromethane/methanol/aqueous ammonia). 797 mg of [4-(4-chloro-3-cyanopyrid-2-yl)phenyl]carbamic acid tert-butyl ester are obtained, the characteristics of which are as follows:

Provenance & Evidence