(2R)-but-3-yn-2-ol → HCID 178433233, compound

Participants

Reaction Steps

Using Method C above, (R)-But-3-yn-2-ol (189 mg, 2.71 mmol) (Aldrich) was coupled with (Z)-1,3-dihydro-5-fluoro-4-iodo-3-[(4-methyl-1H-imidazol-5-yl)methylene]-2H-indol-2-one (100 mg, 0.27 mmol) (Starting Material 3 supra) using (Ph3P)4Pd (30 mg, 0.03 mmol) and Cul (2 mg) in a mixture of DMF (5 mL) and Et3N (5 mL) as solvent at 80° C. for 4 hrs. Upon completion, the reaction mixture was diluted with EtOAc and extracted with H2O. The organic layer was dried over Na2SO4 and concentrated. (R)-(Z)-1,3-Dihydro-5-fluoro-4-(3-hydroxy-1-butynyl)-3-[(4-methyl-1H-imidazol-5-yl)methylene]-2H-indol-2-one was obtained after silica gel column chromatography with a 0-10% MeOH in CH2Cl2 gradient and trituration with Et2O. (Yield 40 mg, 47%).

Provenance & Evidence