Hydrochloric Acid → 1-(2,5-Dichloroquinolin-3-yl)ethanol

反応式

[Cl:1][C:2]1[C:11]([CH:12]=[O:13])=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][C:8]=2[Cl:14])[N:3]=1.[CH3:15][Mg]Br.Cl>C1COCC1>[Cl:1][C:2]1[C:11]([CH:12]([OH:13])[CH3:15])=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][C:8]=2[Cl:14])[N:3]=1

参加物

実験手順

Dissolved 2,5-dichloroquinoline-3-carbaldehyde (2.46 g, 11 mmol) in THF (70 mL) and submerged in an ice-bath. Added methylmagnesium bromide (5.4 mL, 16 mmol) and removed the ice-bath. After 10 min. the reaction mixture was poured into 1.0 N HCl and extracted with EtOAc. The organic layer was dried with sodium sulfate, filtered, and concentrated. The residue was chromatographed on 80 g silica gel column with 0-40% EtOAc:Hex. The desired fractions were combined and concentrated to yield an off white, crystalline solid. 1H NMR (400 MHz, DCM-d2) δ ppm 1.60 (d, J=6.26 Hz, 3 H) 2.35 (br. s., 1 H) 5.36 (q, J=6.39 Hz, 1 H) 7.61-7.67 (m, 2 H) 7.87-7.94 (m, 1 H) 8.75 (s, 1 H). LC-MS (+esi, M+H+=242.1).