Dichloromethane → Isopropyl 4-(5-bromobenzo[d]oxazol-2-yl)piperidine-1-carboxylate
Reaktionsgleichung
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([CH:10]3[CH2:15][CH2:14][NH:13][CH2:12][CH2:11]3)=[N:7][C:6]=2[CH:16]=1.C(Cl)Cl.C(Cl)Cl.[OH2:23]>>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([CH:10]3[CH2:11][CH2:12][N:13]([C:8]([O:9][CH:5]([CH3:6])[CH3:4])=[O:23])[CH2:14][CH2:15]3)=[N:7][C:6]=2[CH:16]=1Komponenten
4
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
Intermediate 5 (980 mg, 3.31 mmol) was dissolved in DCM (50 mol) and added TEA (0.45 ml, 3.31 mmol). Reaction mixture cooled to 0° C., isopropylchloro formate (2.7 ml, 6.62 mmol) was added and stirred the reaction mixture for 3 h at rt. Work up (DCM/H2O) followed by column purification on 60-120 mesh silica gel using EtOAc and Petether (15:85) as eluent afforded the titled compound (500 mg) as a pale-red solid.