1-(5-(4-((7R,8aS)-octahydro-5,5-dimethylindolizin-7-ylamino)-5-fluoropyrimidin-2-ylamino)-2-bromo-4-fluorophenyl)-4-methyl-1H-tetrazol-5(4H)-one (304.5 mg, 0.55 mmol) was weighed out and added to a reaction tube with magnetic stir bar. Triphenylphosphine (43.5 mg, 0.17 mmol) and copper(I) iodide (12.9 mg, 0.068 mmol) were then weighed out and added. 11 mL dioxane was added, followed by diisopropylethylamine (0.65 mL, 3.73 mmol) and propargyl alcohol (0.054 mL, 0.93 mmol). The reaction was subjected to vigorous sub-surface nitrogen sparge and [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (40.5 mg, 0.055 mmol) was weighed out and added, and the reaction was sealed under nitrogen. The reaction was heated overnight at 110° C. The reaction solution was then combined with a 0.186 mmol pilot reaction run under the same conditions, concentrated directly onto silica, and purified by column chromatography. Pure fractions were combined, concentrated, and dried under high vacuum to give 84.0 mg of the title compound (22% total).
