4-Pentyn-2-ol, (2S)- → HCID 178433232, compound

Participants

Reaction Steps

Using Method C above, (S)-pent-4-yn-2-ol (68 mg, 0.82 mmol) (see Example 81 below) 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 (31 mg, 0.03 mmol) and Cul (6 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 concentrated and the residue was chromatographed on a silica gel column with neat CH3CN then THF and finally MeOH as elution solvent. The resulting (S)-(Z)-1,3-Dihydro-5-fluoro-4-(4-hydroxy-1-pentynyl)-3-[(4-methyl-1H-imidazol-5-yl)methylene]-2H-indol-2-one was triturated with Et2O and then recrystalized from superheated EtOH. (Yield 57 mg, 65%).

Provenance & Evidence