تفاعل #612128

معادلة التفاعل

triphenylphosphane

4-bromo-3-methyl-pyridine

K3PO4

[3-(tert-butoxycarbonylamino)-4-pyridyl]boronic acid

→

3′-methyl-[4,4′-bipyridin]-3-amine

المذيبات

dioxane

ظروف التفاعل

المعالجة

1. 1
   أخرىThe reaction mixture was partitioned between water and DCM
2. 2
   استخلاصCombined organic extract
3. 3
   أخرىwas dried
4. 4
   تركيزconcentrated in vacuo
5. 5
   workup.DISSOLUTIONThe residue was dissolved in DCM (10 mL)
6. 6
   workup.ADDITIONTFA (2 mL) was added
7. 7
   تركيزthe reaction mixture was concentrated in vacuo
8. 8
   غسيلwashed with MeOH
9. 9
   غسيلThe product was eluted with a 2M NH3 in MeOH
10. 10
    تركيز, filtrate was concentrated in vacuo

الإجراء التجريبي

[3-(tert-butoxycarbonylamino)-4-pyridyl]boronic acid (100 mg, 0.4201 mmol), palladium; triphenylphosphane (48.55 mg, 0.04201 mmol), 4-bromo-3-methyl-pyridine (113.9 mg, 0.5461 mmol), K3PO4 (630.0 μL of 2 M, 1.260 mmol), in dioxane (4.000 mL) was heated at 130° C. for 30 min in a MW. The reaction mixture was partitioned between water and DCM. Combined organic extract was dried and concentrated in vacuo. The residue was dissolved in DCM (10 mL) and TFA (2 mL) was added. After 1 h, the reaction mixture was concentrated in vacuo. The residue was loaded on a SCX column, washed with MeOH. The product was eluted with a 2M NH3 in MeOH., filtrate was concentrated in vacuo yielding 3′-methyl-[4,4′-bipyridin]-3-amine that was used in next reaction w/o further purification (90 mg). MS (ES+) 172.1.

المصدر