Stannane, tributyl(1-ethoxyethenyl)- → HCID 71549177, compound

Participants

Reaction Conditions

Reaction Steps

A stirred suspension of (1R,2R)-2-((6-((5-bromo-1H-benzo[d]imidazol-1-yl)methyl)benzo[d]thiazol-2-yl)amino)cyclohexanol (150 mg, 0.33 mmol) from Step 5 of Example 108 and tributyl(1-ethoxyvinyl)tin (177 mg, 0.5 mmol) in DMA (1.5 mL) was purged with a stream of argon for 5 min. To the mixture was added tetrakis(triphenylphosphine)palladium (0) (57 mg, 0.05 mmol) and argon was bubbled into the mixture for an additional 5 min. The reaction vessel was sealed and the mixture was heated at 110° C. for 3 h. The mixture was cooled to rt. To the mixture was added 0.5 M aq HCl (500 μL) followed by stirring at rt for 12 h. The mixture was filtered, and the filtrate was purified directly by reverse-phase preparative HPLC using a mixture of water (5% CH3CN, 0.05% HCOOH) and CH3CN (0.05% HCOOH) as the mobile phase and a Varian Pursuit XRs C18 column as the stationary phase. The product was further purified by silica gel flash chromatography eluting with 5% MeOH in CH2Cl2 to afford 1-(1-((2-(((1R,2R)-2-hydroxycyclohexyl)amino)benzo[d]thiazol-6-yl)methyl)-1H-benzo[d]imidazol-5-yl)ethanone (11 mg, 8%) as a white powder. 1H NMR (300 MHz, DMSO-d6) δ 8.57 (s, 1H), 8.32 (s, 1H), 7.97 (d, J=7.5 Hz, 1H), 7.85 (d, J=8.5 Hz, 1H), 7.64-7.72 (m, 2H), 7.30 (m, 1H), 7.20 (m, 1H), 5.52 (s, 2H), 4.73 (d, J=5.1 Hz, 1H), 3.52 (m, 1H), 3.34 (m, 1H), 2.62 (s, 3H), 2.02 (m, 1H), 1.90 (m, 1H), 1.55-1.69 (m, 2H), 1.10-1.35 (m, 4H); LCMS (ESI) m/z 421 (M+H)+.

Provenance & Evidence