1,4-Dioxane → N-(7-(4-chloro-3-methoxyphenyl)-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)-4-(2-hydroxypropan-2-yl)benzamide

Participants

Reaction Conditions

Reaction Steps

A suspension of N-(7-chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)-4-(2-hydroxypropan-2-yl)benzamide (2F, 80 mg, 0.232 mmol), 4-chloro-3-methoxyphenylboronic acid (56.2 mg, 0.302 mmol), and 1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (16 mg, 22 μmol) in 2:1 1,4-dioxane/saturated aqueous NaHCO3 (0.774 mL of 1,4-dioxane and 0.387 mL of saturated aqueous NaHCO3) was prepared in a 10 mL microwave reaction vessel and the sealed reaction vessel warmed to 110° C. for 10 minutes in a CEM microwave reactor. The reaction mixture was cooled to rt, diluted with methanol, filtered, and purified via preparative HPLC (65-70% MeCN/H2O gradient+0.01% TFA). Lyophilization of the combined fractions gave the titled compound as a yellow solid (42.3 mg, 40%). 1H NMR (DMSO-d6) δ: 11.15 (s, 1H), 7.95 (d, J=8.6 Hz, 2H), 7.91 (s, 1H), 7.78 (d, J=1.8 Hz, 1H), 7.59-7.65 (m, 1H), 7.50-7.59 (m, 3H), 6.34 (s, 1H), 3.88 (s, 3H), 2.34 (s, 3H), 1.39 (s, 6H); ESI-MS: m/z 451.1 (M+H)+.

Provenance & Evidence