تفاعل #1994293

معادلة التفاعل

6-amino-5-chloro-2-(4-chloro-2-fluorophenyl)-pyrimidine-4-carboxylic acid

HCl

acetyl chloride

ethyl acetate hexane

→

title compound

المردود 63.5%

6-Amino-5-chloro-2-(4-chloro-2-fluorophenyl)pyrimidine-4-carboxylic acid ethyl ester

المردود 63.5%

المذيبات

ethanol

ethanol

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةcooled in an ice bath
2. 2
   تركيزThe reaction mixture was concentrated
3. 3
   أخرىthe residue partitioned between ethyl acetate and water
4. 4
   أخرىThe organic phase was dried
5. 5
   تركيزconcentrated
6. 6
   أخرىthe product was purified by column chromatography (dichloromethane/ethyl acetate gradient)

الإجراء التجريبي

A 1N solution of HCl in ethanol was generated by adding 0.565 mL of acetyl chloride dropwise to 12 mL of ethanol cooled in an ice bath. This solution was added to 200 mg of 6-amino-5-chloro-2-(4-chloro-2-fluorophenyl)-pyrimidine-4-carboxylic acid and the resulting solution was heated at 62° C. overnight. The reaction mixture was concentrated and the residue partitioned between ethyl acetate and water. The organic phase was dried and concentrated, and the product was purified by column chromatography (dichloromethane/ethyl acetate gradient). A second chromatography utilizing an amine-functionalized silica gel column (Biotage KP-NH) and an ethyl acetate/hexane gradient solvent system yielded the title compound (139 mg, 63.5% yield): mp 131-132° C.: 1H NMR (CDCl3): δ 7.97 (m, 1H), 7.2 (m, 2H), 5.63 (br s, 2H), 4.48 (q, 2H), 1.44 (t, 3H).

المصدر