Triethylamine → 2-{[2-(hex-1-yn-1-yl)-1,3-thiazol-4-yl]methoxy}-1H-isoindole-1,3(2H)-dione

Participants

Reaction Steps

To a solution of 2-[(2-bromo-1,3-thiazol-4-yl)methoxy]-1H-isoindole-1,3(2H)-dione (23.1 g, 68.1 mmol) in dry tetrahydrofuran (300 mL) were added 1-hexyne (11.2 g, 136 mmol), triethylamine (13.8 g, 136 mmol). The reaction mixture was degassed by blowing a flow of Argon through it, then palladium tetrakis(triphenylphosphine) (3.94 g, 3.41 mmol) and copper iodide (1.30 g, 6.81 mmol) were added. After stirring at room temperature for 21 h under argon, the mixture was concentrated in vacuo, diluted with water (800 mL) and ethyl acetate (900 mL), the organic layer was washed with water, dried (MgSO4) and concentrated in vacuo. Purification on silica gel afforded 2-{[2-(hex-1-yn-1-yl)-1,3-thiazol-4-yl]methoxy}-1H-isoindole-1,3(2H)-dione [13.6 g, yield 59%; HPLC/MS: m/z=341 (M+H); log P(HCOOH)=3.78].

Provenance & Evidence