Ethanol → Ethyl 2-(2-chloro-5-nitrophenyl)acetate

反応式

S(Cl)(Cl)=O.[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([N+:12]([O-:14])=[O:13])=[CH:8][C:7]=1[CH2:15][C:16]([OH:18])=[O:17].[CH3:19][CH2:20]O>>[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([N+:12]([O-:14])=[O:13])=[CH:8][C:7]=1[CH2:15][C:16]([O:18][CH2:19][CH3:20])=[O:17]

参加物

反応物 3

HCID 702Ethanol

HCID 24386Thionyl Chloride

HCID 8271282-(2-Chloro-5-nitrophenyl)acetic acid

生成物 1

HCID 22970611Ethyl 2-(2-chloro-5-nitrophenyl)acetate収率 99%

実験手順

Thionyl chloride (16.7 g, 0.14 mol) was added dropwise to a 0° C. solution of (2-chloro-5-nitro-phenyl)acetic acid (15 g, 0.07 mol) in EtOH (300 mL) and the resultant mixture was heated at reflux overnight. The reaction mixture was concentrated under reduced pressure and the residue was poured into ice water, and extracted with EtOAc (2×300 mL). The combined organics were washed with brine and saturated NaHCO3 solution, were dried over Na2SO4, and were concentrated in vacuo to give ethyl 2-(2-chloro-5-nitrophenyl)acetate (17 g, 99% yield). 1H NMR (400 MHz, DMSO-d6): δ 8.35 (d, J= 2.8 Hz, 1 H), 8.12 (dd, J=8.4, 2.8 Hz, 1 H), 7.72 (d, J=8.4 Hz, 1 H), 4.10 (q, J=7.2 Hz, 2 H), 3.96 (s, 2 H), 1.15 (t, J=7.2 Hz, 3 H).