تفاعل #610440

معادلة التفاعل

2-(3-methoxypyridin-2-yl)-N-(2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetamide

CDI

→

5-methoxy-2-(2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1H-pyrido[1,2-c]pyrimidine-1,3(2H)-dione

المردود 37.0%

المذيبات

toluene

ظروف التفاعل

المعالجة

1. 1
   أخرىThe cooled mixture was partitioned between EtOAc and water
2. 2
   غسيلThe organic layer was washed sequentially with water and brine
3. 3
   أخرىdried
4. 4
   تركيزconcentrated
5. 5
   أخرىThe residue was purified by column chromatography on silica gel
6. 6
   غسيلeluting with EtOAc-hexanes

الإجراء التجريبي

A mixture of 2-(3-methoxypyridin-2-yl)-N-(2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetamide (1.45 g, 3.78 mmol) and CDI (2.45 g, 15.1 mmol) in toluene (19 mL) was heated at 110° C. for 3 h. The cooled mixture was partitioned between EtOAc and water. The organic layer was washed sequentially with water and brine, dried and concentrated. The residue was purified by column chromatography on silica gel, eluting with EtOAc-hexanes, to give 5-methoxy-2-(2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-1H-pyrido[1,2-c]pyrimidine-1,3(2H)-dione as a yellow solid (0.571 g, 37% yield). Mass spectrum m/z 409 (M+H)+. 1H NMR (400 MHz, chloroform-d) δ 7.96 (d, J=7.0 Hz, 1H), 7.91 (dd, J=7.4, 1.2 Hz, 1H), 7.33 (t, J=7.6 Hz, 1H), 7.22 (dd, J=7.8, 1.2 Hz, 1H), 6.39-6.30 (m, 2H), 6.24 (s, 1H), 3.93 (s, 3H), 2.34 (s, 3H), 1.34 (s, 12H).

المصدر