Butyl iodide → (E)-ethyl 3-(4-((E)-2-(3-butoxyphenyl)-1-(1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)but-1-en-1-yl)phenyl)acrylate

Participants

Reaction Steps

Potassium carbonate (53 mg, 0.38 mmol) was added to (E)-ethyl 3-(4-((E)-2-(3-hydroxyphenyl)-1-(1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)but-1-en-1-yl)phenyl)acrylate (101 mg, 0.19 mmol) in CH3CN (1 mL). After stirring for 15 min, iodobutane (24 μL, 0.21 mmol) was added. The reaction was stirred at rt for 15 h. Additional iodobutane (24 μL, 0.21 mmol) was added, and the reaction was stirred at 60° C. for 10 h and then at rt for 48 h. The reaction was diluted with dichloromethane and filtered through celite. The filtrate was concentrated and purified by silica gel chromatography (0˜20% EtOAc in hexanes) to give 97 mg of (E)-ethyl 3-(4-((E)-2-(3-butoxyphenyl)-1-(1-(tetrahydro-2H-pyran-2-yl)-1H-indazol-5-yl)but-1-en-1-yl)phenyl)acrylate as a white foam. 1H NMR (400 MHz, DMSO-d6): δ 8.12 (s, 1H), 7.73 (d, 1H), 7.64 (s, 1H), 7.49 (d, 1H), 7.41 (d, 2H), 7.24 (dd, 1H), 7.12 (t, 1H), 6.91 (d, 2H), 6.76 (d, 1H), 6.67-6.72 (m, 2H), 6.48 (d, 1H), 5.86 (d, 1H), 4.15 (q, 2H), 3.86-3.94 (m, 1H), 3.72-3.80 (m, 3H), 2.38-2.46 (m, 3H), 1.96-2.10 (m, 2H), 1.70-1.82 (m, 1H), 1.52-1.63 (m, 4H), 1.31-1.37 (m, 2H), 1.22 (t, 3H), 0.85-0.92 (m, 6H); LCMS: 495 [(M-THP+H)+H]+.

Provenance & Evidence