Reacción #42392

Ecuación de reacción

(2R,3S)-3-amino-4-(3,5-difluorophenyl)-1-{[1-(3-ethynylphenyl)cyclopropyl]amino}-3-methylbutan-2-ol dihydrochloride

Methyl 3-bromo-5-{[butyl(methyl)amino]methyl}benzoate

diisopropylethylamine

HATU

→

title compound

3-Bromo-5-{[butyl(methyl)amino]methyl}-N-((1S,2R)-1-(3,5-difluorobenzyl)-3-{[1-(3-ethynylphenyl)cyclopropyl]amino}-2-hydroxypropyl)benzamide dihydrochloride

Disolventes

tetrahydrofuran methanol water

lithium hydroxide monohydrate

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONis added (30 mg, 0.72 mmol)
2. 2
   ConcentraciónThe solution is concentrated under reduced pressure
3. 3
   workup.DISSOLUTIONThe residue is redissolved in DMF (5 mL)
4. 4
   workup.ADDITIONare added
5. 5
   workup.STIRRINGThe reaction stirred at room temperature 16 h
6. 6
   OtroPurification by flash column chromatography (silica, 8% methanol/methylene chloride)

Procedimiento

Methyl 3-bromo-5-{[butyl(methyl)amino]methyl}benzoate (113 mg, 0.36 mmol) is dissolved in 2:1:1 tetrahydrofuran/methanol/water (4 mL), and lithium hydroxide monohydrate is added (30 mg, 0.72 mmol), and the reaction stirred 16 h. The solution is concentrated under reduced pressure. The residue is redissolved in DMF (5 mL), and diisopropylethylamine (250 μL, 1.44 mmol), HATU (170 mg, 0.45 mmol), and (2R,3S)-3-amino-4-(3,5-difluorophenyl)-1-{[1-(3-ethynylphenyl)cyclopropyl]amino}-3-methylbutan-2-ol dihydrochloride prepared as in Example SP-264 (170 mg, 0.4 mmol) are added. The reaction stirred at room temperature 16 h. Purification by flash column chromatography (silica, 8% methanol/methylene chloride) provides the title compound as the free base. The residue is dissolved in diethyl ether (3 mL) and 1N hydrochloric acid in diethyl ether (1 mL) is added. The mixture is concentrated under reduced pressure to yield the title compound. ESI MS m/z 638.2 [M+H]+.

Fuente