تفاعل #989455

معادلة التفاعل

tert-butyl 4-(2-(1-hydroxycyclohexyl)-2-{3-[(trimethylsilyl)ethynyl]phenyl}ethyl)piperazine-1-carboxylate

potassium carbonate

→

tert-butyl 4-[2-(3-ethynylphenyl)-2-(1-hydroxycyclohexyl)ethyl]piperazine-1-carboxylate

المردود 80.0%

المذيبات

methanol

ظروف التفاعل

المعالجة

1. 1
   أخرىThe reaction mixture was quenched with aqueous ammonium chloride (5 mL)
2. 2
   استخلاصextracted with ethyl acetate
3. 3
   غسيلThe organic layer was washed with water, brine
4. 4
   تجفيفdried (sodium sulfate)
5. 5
   ترشيحfiltered
6. 6
   تركيزconcentrated
7. 7
   أخرىto give a crude oil, which
8. 8
   أخرىwas purified via silica gel flash chromatography (gradient from 10% ethyl acetate/hexane to 30% ethyl acetate/hexane)

الإجراء التجريبي

To a solution of tert-butyl 4-(2-(1-hydroxycyclohexyl)-2-{3-[(trimethylsilyl)ethynyl]phenyl}ethyl)piperazine-1-carboxylate (104 mg, 0.215 mmol) in methanol (3 mL) was added potassium carbonate (300 mg, 2.17 mmol) and the mixture was stirred for 30 min at room temperature. The reaction mixture was quenched with aqueous ammonium chloride (5 mL) and extracted with ethyl acetate. The organic layer was washed with water, brine, dried (sodium sulfate), filtered and concentrated to give a crude oil, which was purified via silica gel flash chromatography (gradient from 10% ethyl acetate/hexane to 30% ethyl acetate/hexane) to yield 70 mg (80%) tert-butyl 4-[2-(3-ethynylphenyl)-2-(1-hydroxycyclohexyl)ethyl]piperazine-1-carboxylate as a white solid. MS (ESI) m/z 413 ([M+H]+); HRMS: calcd for C25H36N2O3+H, 413.2804; found (ESI, [M+H]+), 413.2809.

المصدر