Tributylphosphine → HCID 86700913, compound

Participants

Reaction Steps

A flame-dried 100 mL round-bottom flask containing 6-chloro-2-(2-methoxyimidazo[2,1-b][1,3,4]thiadiazol-6-yl)benzofuran-4-ol (Example 37I, 25 mgs, 0.078 mmol) and (2-phenylthiazol-4-yl)methanol (Example 3B, 37.2 mgs, 0.194 mmol) in dry THF (4 mL) was added tributylphosphine (0.050 mL, 0.194 mmol). The resulting solution was charged with a solution of ADDP (49.0 mgs, 0.194 mmol) in THF (1 mL) added dropwise over 30 minutes via syringe pump. After stirring for 1.5 hours the reaction mixture was diluted with EtOAc then washed with 1N HCl, sat. NaHCO3, water and brine. The organic phase was dried (MgSO4) then concentrated to dryness. The residue was purified by ISCO using 0 to 10% diethyl ether in DCM. Fractions containing the desired product were concentrated to give the title material as a beige solid (20 mgs, 0.040 mmol, 52.0% yield). LC (Method A): 2.534 min. LCMS (APCI) calcd for C23H16ClN4O3S2 [M+H]+ m/z 495.03, found 495.0. 1H NMR (CDCl3, 400 MHz) δ ppm: 8.49 (s, 1H), 7.99-7.96 (m, 2H), 7.93 (s, 1H), 7.55-7.50 (m, 3H), 7.40 (dd, J=0.8, 1.6 Hz, 1H), 7.15 (dd, J=0.4, 1.6 Hz, 1H), 7.14 (d, J=0.8 Hz, 1H), 5.43 (s, 2H), 4.21 (s, 3H).

Provenance & Evidence