反応 #610078

反応方程式

2,4-dichloropyrimidine-5-carbonitrile

3-amino-N-methylbenzamide

N-ethyl-N-isopropylpropan-2-amine

→

3-(2-chloro-5-cyanopyrimidin-4-ylamino)-N-methylbenzamide

3-(4-chloro-5-cyanopyrimidin-2-ylamino)-N-methylbenzamide

収率 51.1%

溶媒

DME

反応条件

後処理

1. 1
   その他The resulting reaction mixture
2. 2
   濃縮concentrated
3. 3
   その他purified
4. 4
   その他Separation of 2- and 4-substitution products
5. 5
   濃縮concentrated

実験手順

To 3-amino-N-methylbenzamide (353 mg, 2.351 mmol) in DME (8 mL) at 0° C. was added N-ethyl-N-isopropylpropan-2-amine (1.024 mL, 5.88 mmol) followed by 2,4-dichloropyrimidine-5-carbonitrile (450.0 mg, 2.59 mmol). The resulting reaction mixture was allowed to warm to RT (ice melt) over 3 h, concentrated, purified using MPLC (25 g cartridge, 40 g column, 0 to 100% EtOAc-hexanes). Separation of 2- and 4-substitution products was not achieved. Fractions with both products were combined and concentrated giving about a 3:1 mixture of 3-(2-chloro-5-cyanopyrimidin-4-ylamino)-N-methylbenzamide and 3-(4-chloro-5-cyanopyrimidin-2-ylamino)-N-methylbenzamide (172.7 mg).

出典