Nitrogen → 3-(4-(6-chloro-2-(((3R,3aR,6R,6aR)-6-hydroxyhexahydrofuro[3,2-b]furan-3-yl)oxy)-1H-imidazo[4,5-b]pyridin-5-yl)phenyl)-3-methylthietane 1,1-dioxide

Participants

Reaction Conditions

Reaction Steps

Step E A solution of (3R,3aR,6R,6aR)-6-((6-chloro-5-iodo-1H-imidazo[4,5-b]pyridin-2-yl)oxy)hexahydrofuro[3,2-b]furan-3-ol (100 mg, 0.236 mmol), LiOH (29.7 mg, 0.708 mmol), and PdCl2(dppf)-CH2Cl2 adduct (38.6 mg, 0.047 mmol), in a thick-walled tube, was flushed with N2. Then water (0.5 ml) was added, followed by a solution of 3-methyl-3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)thietane 1,1-dioxide (114 mg, from Step D) in dioxane (3.5 ml). The tube was flushed with N2, and placed in a preheated 72° C. hot oil bath and heated to 80° C. for 3 hours. The reaction mixture was cooled to RT and diluted with EtOAc (30 ml) and water (20 ml). The aqueous layer was separated, and extracted with EtOAc (25 ml). The combined organic layers were dried (Na2SO4), filtered and concentrated. The resulting crude material was purified by Isco™ system, 24 g gold cartridge, 30 ml flow rate, gradient —40/60 (1 min) to 100/0 (15 min) to 100/0 (19 min total run time) of EtOAc/hexanes. The fractions containing product were combined and concentrated to obtain the title compound as an off-white solid. LC-MS: observed m/e: 492.37 (M+H)+ (Rt 0.85/2 min)

Provenance & Evidence