Tetrabutylammonium Fluoride → HCID 131723042, compound

Participants

Reaction Steps

Tetra-n-butylammonium fluoride (1 M in tetrahydrofuran; 3.94 mL, 3.94 mmol) was added to a solution of N-[2,6-dichloro-4-[[[[3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]phenyl]methyl]amino]carbonyl]benzoyl]-3-[(thiophene-2-carbonyl)amino]-L-alanine (2.38 g, 3.6 mmol) in tetrahydrofuran (30 mL). The solution was stirred at room temperature for 3 h, then diluted with ethyl acetate and concentrated. The residue was chromatographed (50-100% ethyl acetate/hexanes then 10% methanol/ethyl acetate) to give N-[2,6-dichloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-[(thiophene-2-carbonyl)amino]-L-alanine, methyl ester (1.68 g, 85%) as a white solid.

Provenance & Evidence