تفاعل #438461

معادلة التفاعل

cyclopropylmagnesium bromide

cyclopropyl bromide

magnesium

5-(4-{2-[(aminocarbonyl)-amino]ethyl}phenyl)-N-methoxy-1-(4-methoxyphenyl)-N-methyl-1H-pyrazole-3-carboxamide

→

N-(2-{4-[3-(cyclopropylcarbonyl)-1-(4-methoxyphenyl)-1H-pyrazol-5-yl]phenyl}ethyl)urea

المذيبات

THF

THF

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe reaction mixture was cooled to ambient temperature
2. 2
   أخرىwas quenched
3. 3
   workup.ADDITIONby adding saturated aqueous ammonium chloride solution
4. 4
   استخلاصThe mixture was extracted with AcOEt
5. 5
   غسيلThe organic layer was washed with 1M HCl, saturated aqueous sodium bicarbonate solution, saturated aqueous sodium chloride solution
6. 6
   تجفيفdried over magnesium sulfate
7. 7
   تركيزconcentrated in vacuo
8. 8
   أخرىThe residue was purified by preparative thin layer silica gel chromatography
9. 9
   استخلاصThe separated silica gel was extracted with 10% MeOH/CHCl3
10. 10
    أخرىthe solvent was evaporated in vacuo

الإجراء التجريبي

To a solution of cyclopropylmagnesium bromide, which was prepared from cyclopropyl bromide (257 ml) and magnesium (57 mg) in THF (1 ml) as usual method, was added a solution of 5-(4-{2-[(aminocarbonyl)-amino]ethyl}phenyl)-N-methoxy-1-(4-methoxyphenyl)-N-methyl-1H-pyrazole-3-carboxamide (90 mg) in THF (3 ml) dropwise at ambient temperature. The mixture was stirred at 50° C. for 5 hours. The reaction mixture was cooled to ambient temperature and was quenched by adding saturated aqueous ammonium chloride solution. The mixture was extracted with AcOEt. The organic layer was washed with 1M HCl, saturated aqueous sodium bicarbonate solution, saturated aqueous sodium chloride solution, dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by preparative thin layer silica gel chromatography developed by MeOH/CHC3 10%. The separated silica gel was extracted with 10% MeOH/CHCl3 and the solvent was evaporated in vacuo to give N-(2-{4-[3-(cyclopropylcarbonyl)-1-(4-methoxyphenyl)-1H-pyrazol-5-yl]phenyl}ethyl)urea (23 mg) as a powder.

المصدر