تفاعل #1772021

معادلة التفاعل

EDCI

α-bromophenylacetic acid

(S)-(−)-1-phenylethanol

→

title compound

المردود 73.0%

(S)-1-Phenylethyl 2-bromo-2-phenylacetate

المردود 73.0%

المذيبات

ethyl acetate

dichloromethane

ظروف التفاعل

المعالجة

1. 1
   غسيلwashed (H2O×2, brine)
2. 2
   تجفيفdried (Na2SO4)
3. 3
   ترشيحfiltered
4. 4
   تركيزconcentrated
5. 5
   أخرىto give a pale yellow oil

الإجراء التجريبي

To a mixture of α-bromophenylacetic acid (10.75 g, 0.050 mol), (S)-(−)-1-phenylethanol (7.94 g, 0.065 mol) and DMAP (0.61 g, 5.0 mmol) in dry dichloromethane (100 mL) was added solid EDCI (12.46 g, 0.065 mol) all at once. The resulting solution was stirred at room temperature under Ar for 18 hours and then it was diluted with ethyl acetate, washed (H2O×2, brine), dried (Na2SO4), filtered, and concentrated to give a pale yellow oil. Flash chromatography (SiO2/hexane-ethyl acetate, 4:1) of this oil provided the title compound (11.64 g, 73%) as a white solid. 1H NMR (400 MHz, CDCl3) δ 7.53-7.17 (m, 10H), 5.95 (q, J=6.6 Hz, 0.5H), 5.94 (q, J=6.6 Hz, 0.5H), 5.41 (s, 0.5H), 5.39 (s, 0.5H), 1.58 (d, J=6.6 Hz, 1.5H), 1.51 (d, J=6.6 Hz, 1.5H).

المصدر