تفاعل #680085

معادلة التفاعل

219a

3-(3-Aminophenylamino)-5-bromo-1-methylpyrazin-2(1H)-one

(3-(acetoxymethyl)-2-(7,7-dimethyl-1-oxo-3,4,7,8-tetrahydro-1H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2(6H)-yl)pyridin-4-yl)boronic acid

{3-[(Acetyloxy)methyl]-2-{4,4-dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}pyridin-4-yl}boronic Acid

potassium acetate

K3PO4

→

219b

المردود 38.5%

(4-{6-[(3-Aminophenyl)amino]-4-methyl-5-oxo-4,5-dihydropyrazin-2-yl}-2-{4,4-dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}pyridin-3-yl)methyl Acetate

المردود 38.5%

المذيبات

acetonitrile

ظروف التفاعل

المعالجة

1. 1
   أخرىA 50-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser
2. 2
   أخرىAfter three cycles of vacuum/argon flush
3. 3
   ترشيحIt was then filtered
4. 4
   أخرىthe filtrate was evaporated in vacuo
5. 5
   أخرىThe residue was purified by silica-gel column chromatography
6. 6
   غسيلeluting with 20:1 ethyl acetate/methanol

الإجراء التجريبي

A 50-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 219a (480 mg, 1.62 mmol), (3-(acetoxymethyl)-2-(7,7-dimethyl-1-oxo-3,4,7,8-tetrahydro-1H-cyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2(6H)-yl)pyridin-4-yl)boronic acid 199e (1.61 g, 4.05 mmol), Pd(dppf)Cl2 (134 mg, 0.162 mmol), potassium acetate (318 mg, 3.24 mmol), K3PO4 (706 mg, 3.24 mmol), acetonitrile (20 mL), and water (8 drops). After three cycles of vacuum/argon flush, the mixture was heated at 100° C. for 2 h. It was then filtered and the filtrate was evaporated in vacuo. The residue was purified by silica-gel column chromatography eluting with 20:1 ethyl acetate/methanol to afford 219b (354 mg, 38%) as a yellow solid. MS-ESI: [M+H]+ 568.3

المصدر