반응 #41907

반응 방정식

(S)-2-tert-Butoxycarbonylamino-3-(4-hydroxy-phenyl)-propionic acid methyl ester

4-pyridyl boronic acid

Triethylamine

→

(S)-2-tert-Butoxycarbonylamino-3-[4-(pyridin-4-yloxy)-phenyl]-propionic acid methyl ester

수율 20.7%

용매

DCM

ethyl acetate

반응 조건

후처리

1. 1
   세척washed with 10% sodium carbonate (6×)
2. 2
   기타The organic layer was dried
3. 3
   농축concentrated under reduced pressure
4. 4
   기타The residue was purified over silica gel (hexanes-EtOAc)

실험 절차

(S)-2-tert-Butoxycarbonylamino-3-(4-hydroxy-phenyl)-propionic acid methyl ester (8.46 mmol), 4-pyridyl boronic acid (29.6 mmol), Cu(OAc)2 (16.9 mmol), and molecular sieves were suspended in 25 mL of DCM. Triethylamine (59.2 mmol) was added and the mixture stirred at rt for 10 h. The mixture was diluted with ethyl acetate and washed with 10% sodium carbonate (6×). The organic layer was dried and concentrated under reduced pressure. The residue was purified over silica gel (hexanes-EtOAc) to provide (S)-2-tert-Butoxycarbonylamino-3-[4-(pyridin-4-yloxy)-phenyl]-propionic acid methyl ester (653 mg). LC-MS (m/z) 374.

출처