A mixture of 5-chloro-2-[3-(1,1-Dioxo-1-thiomorpholin-4-yl)azetidin-1-ylmethyl]-7-morpholin-4-ylthiazolo[5,4-d]pyrimidine (150 mg, 0.33 mmol), 2-ethylbenzimidazole (58 mg, 0.39 mmol), tris(dibenzylideneacetone)dipalladium (15 mg, 0.02 mmol), Xphos (31 mg, 0.07 mmol) and Cs2CO3 (213 mg, 0.65 mmol) in dioxane (3 mL) was purged with argon then heated at 145° C. for 45 min in a microwave reactor. The reaction mixture was filtered through a pad of celite, washing with EtOAc. The filtrate was concentrated in vacuo and purified by column chromatography (Si—PCC, MeOH:EtOAc, 0-10%) affording 436 as a foam (113 mg, 60%). LCMS (Method I): RT 2.59 min, [M+H]+ 569.3. 1H NMR (CDCl3, 400 MHz): δ 8.02-7.97 (m, 1 H); 7.79-7.75 (m, 1 H); 7.33-7.27 (m, 2 H); 4.41 (m, 4 H); 4.02 (s, 2 H); 3.91-3.81 (m, 4 H); 3.72 (m, 2 H); 3.39-3.30 (m, 3 H); 3.16 (m, 2 H); 3.08 (m, 4 H); 2.90-2.85 (m, 4 H) and 1.44 (t, J=7.5 Hz, 3 H)
