تفاعل #90378

معادلة التفاعل

Triethylsilane

N-(5-(3-formyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridin-5-yl)pyridin-3-yl)propionamide

sulfur

3,3′-bipyridine-4,5-diamine

TFA

→

N-(5-(3-(7-(pyridin-3-yl)-3H-imidazo[4,5-c]pyridin-2-yl)-1H-pyrazolo[3,4-b]pyridin-5-yl)pyridin-3-yl)propionamide

المردود 49.0%

المذيبات

DMF

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe solution was cooled
2. 2
   workup.DISTILLATIONthe DMF was distilled under vacuum
3. 3
   workup.ADDITIONwas added to the solution
4. 4
   أخرىThe solvent was removed under vacuum
5. 5
   workup.ADDITIONWater was added to the residue
6. 6
   أخرىsonicated briefly
7. 7
   أخرىThe solids formed
8. 8
   ترشيحwere filtered
9. 9
   غسيلwashed with cold water
10. 10
    أخرىdried at room temperature
11. 11
    أخرىThe solids were triturated with DCM

الإجراء التجريبي

A solution of N-(5-(3-formyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-b]pyridin-5-yl)pyridin-3-yl)propionamide (LX) (1 eq), sulfur (1 eq) and 3,3′-bipyridine-4,5-diamine (XLVIII) (1 eq) in DMF was heated overnight at 140° C. under argon. The solution was cooled and the DMF was distilled under vacuum. The residue was taken in DCM. Triethylsilane (2.5 eq) followed by TFA (30% by volume) was added to the solution and stirred for 2 h at room temperature until TLC showed disappearance of starting material. The solvent was removed under vacuum. Water was added to the residue, sonicated briefly and basified with 5 N NH4OH solution. The solids formed were filtered, washed with cold water and dried at room temperature. The solids were triturated with DCM followed by MeOH to get N-(5-(3-(7-(pyridin-3-yl)-3H-imidazo[4,5-c]pyridin-2-yl)-1H-pyrazolo[3,4-b]pyridin-5-yl)pyridin-3-yl)propionamide (47) as a brown solid (49% yield). 1H NMR (DMSO-d6, 400 MHz,): δ 1.67 (t, J=6 Hz, 3H), 2.45 (q, J=6 Hz, 2H), 7.62 (m, 1H), 8.50 (s, 1H), 8.62 (m, 1H), 8.72 (s, 1H), 8.77 (m, 3H), 8.91 (m, 1H), 8.99 (m, 2H), 9.41 (s, 1H), 10.31 (s, 1H), 13.95 (s, 1H), 14.62 (s, 1H). ESIMS found C25H19N9O m/z 462.50 (M+H).

المصدر