반응 #706808
ord-a708faf232f145f8bae8e831f9a04b84
반응 방정식
반응물
반응 조건
후처리
- 1온도The resulting solution was warmed to room temperature
- 2온도This solution was heated to 50° C. for 2 hours
- 3온도cooled to room temperature
- 4기타the reaction quenched by the addition of saturated aqueous NH4Cl
- 5추출The solution was extracted with EtOAc
- 6세척the combined organic layers were washed with H2O and saturated aqueous NaCl
- 7건조before being dried (MgSO4)
- 8농축concentrated under reduced pressure
실험 절차
A solution of 2-ethylthiophene (112.0 mg, 1.00 mmol) in 2.0 mL of THF was cooled to -78° C. and n-butyllithium (64.0 mg, 1.00 mmol, 0.63 ml of a 1.6M solution in hexanes) was added and the solution warmed to 0° C. during 1.5 hours. A solution of ZnCl2 (218.0 mg, 1.60 mmol) in 3.0 mL THF was slowly added via cannula. The resulting solution was warmed to room temperature, stirred for 40 minutes, and transferred via cannula to a solution of ethyl 4-[(2,2-dimethyl-4-trifluoromethanesulfonyloxy-(2H)-thiochromen-6-yl)ethynyl]-benzoate (Compound 224, 200.0 mg, 0.40 mmol) and tetrakis(triphenylphosphine) palladium(0) (24.0 mg, 0.02 mmol) in 2.0 mL THF. This solution was heated to 50° C. for 2 hours, cooled to room temperature, and the reaction quenched by the addition of saturated aqueous NH4Cl. The solution was extracted with EtOAc and the combined organic layers were washed with H2O and saturated aqueous NaCl before being dried (MgSO4) and concentrated under reduced pressure. The title compound, 29.0 mg (16%), was isolated by HPLC (1.25% EtOAc/hexanes) as a pale-yellow solid. 1H NMR (300 MHz, CDCl3) δ: 8.01 (2H, d, J=8.4 Hz), 7.65 (1H, s), 7.55 (2H, d, J=8.4 Hz), 7.35 (2H, s), 6.84 (1H, d, J=3.5 Hz), 6.77 (1H, m), 6.02 (1H, s), 4.39 (2H, q, J=7.1 Hz), 2.88 (2H, q, J=7.6 Hz), 1.46 (6H, s), 1.41 (2H, t, J=7.1 Hz), 1.35 (2H, t, J=7.6 Hz),