2-(Tributylstannyl)pyridine → HCID 68110067, compound

Participants

Reaction Conditions

Reaction Steps

Into a 25 ml sealed tube containing a solution of 4-N-[5-bromo-6-ethylthieno[2,3-d]pyrimidin-4-yl]-1-N,1-N-dimethylcyclohexane-1,4-diamine (100 mg, 0.26 mmol, 1.00 equiv) in dioxane (5 mL) was added 2-(tributylstannyl)pyridine (96 mg, 0.26 mmol, 1.00 equiv) and Pd(dppf)Cl2 (30 mg, 0.04 mmol, 0.16 equiv) at room temperature under nitrogen. The sealed tube was heated with stirring overnight at 100° C. The reaction mixture was cooled to room temperature and diluted with 20 mL of H2O, extracted with 3×50 mL of ethyl acetate, washed with brine, dried over sodium sulfate and concentrated under vacuum. The crude product (80 mg) was purified by Prep-HPLC with the following conditions (SHIMADZU): Column, SunFire Prep C18, 19*150 mm 5 um; mobile phase, water with 0.05% NH4HCO3 and CH3CN (6.0% CH3CN up to 49.0% in 27 min); Flow rate, 20 mL/min; UV detection at 254/220 nm. The product-containing fractions were collected and partially evaporated to remove water and CH3CN under reduced pressure. The residue was lyophilized overnight to give the corresponding 4-N-[6-ethyl-5-(pyridin-2-yl)thieno[2,3-d]pyrimidin-4-yl]-1-N,1-N-dimethylcyclohexane-1,4-diamine (12 mg) as a light yellow oil. MS (ES, m/z): 382 [M+H]+. 1H NMR (400 MHz, CDCl3): δ 8.75-8.41 (d, 1H), 7.90 (s, 1H), 7.89-7.84 (m, 1H), 7.46-7.38 (m, 2H), 6.73-6.71 (d, 1H), 3.95-3.89 (m, 1H), 2.89-2.81 (dd, 2, H), 2.29 (s, 6H), 2.25-2.04 (m, 3H), 1.90-1.86 (m, 2 H), 1.47-1.38 (m, 2H), 1.32-1.27 (m, 3H), 1.05-1.92 (m, 2H).

Provenance & Evidence