تفاعل #1265382

معادلة التفاعل

Bromide

1-(4-Bromomethyl-thiazol-2-yl)-ethanone

acetic acid

potassium acetate

→

desired product 4a

المردود 70.0%

Acetic acid 2-acetyl-thiazol-4-ylmethyl ester

المردود 70.0%

المذيبات

ethyl acetate

ethyl acetate

ظروف التفاعل

المعالجة

1. 1
   غسيلwashed with water 3 times
2. 2
   تجفيفThe organic layer was dried (Na2SO4)
3. 3
   تركيزconcentrated in vacuo
4. 4
   أخرىto give a crude oil that

الإجراء التجريبي

Bromide 3a (4.95 g, 0.0224 mol) was heated with acetic acid (50 mL) and potassium acetate (2.64 g, 0.0269 mol) at 100° C. for 16 h. Diluted with ethyl acetate and washed with water 3 times. The organic layer was dried (Na2SO4) and concentrated in vacuo to give a crude oil that was subjected to flash chromatography (20% ethyl acetate/80% hexanes) to give 2.48 g (70%) of the desired product 4a. 1H NMR (CDCl3) δ 7.8 (s, 1H), 5.2 (s, 2H), 2.8 (s, 3H), 2.2 (s, 3H).

المصدر