1-(5-Bromopyridin-3-yl)-4-methylpiperazine → [5-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyrazin-2-yl]-[5-(4-methyl-piperazin-1-yl)-pyridin-3-yl]-amine

HRID 1889840Notes

Reaction equation

HRID 1889840 reaction equation
[CH3:1][S:2]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[N:16]3[N:17]=[C:18]([NH2:20])[N:19]=[C:15]3[CH:14]=[N:13][CH:12]=2)=[CH:7][CH:6]=1)(=[O:4])=[O:3].Br[C:22]1[CH:23]=[C:24]([N:28]2[CH2:33][CH2:32][N:31]([CH3:34])[CH2:30][CH2:29]2)[CH:25]=[N:26][CH:27]=1>>[CH3:1][S:2]([C:5]1[CH:6]=[CH:7][C:8]([C:11]2[N:16]3[N:17]=[C:18]([NH:20][C:22]4[CH:27]=[N:26][CH:25]=[C:24]([N:28]5[CH2:33][CH2:32][N:31]([CH3:34])[CH2:30][CH2:29]5)[CH:23]=4)[N:19]=[C:15]3[CH:14]=[N:13][CH:12]=2)=[CH:9][CH:10]=1)(=[O:3])=[O:4]

Participants

3

Reactant 2

HCID 534853141-(5-Bromopyridin-3-yl)-4-methylpiperazineHCID 674788385-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyrazin-2-ylamine

Product 1

HCID 59612395[5-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyrazin-2-yl]-[5-(4-methyl-piperazin-1-yl)-pyridin-3-yl]-amineYield 4%

Procedure

1-(5-Bromo-pyridin-3-yl)-4-methyl-piperazine was prepared from 3,5-dibromo-pyridine (1.00 g, 4.22 mmol) and piperazine, 1-methyl-(0.936 mL, 8.44 mmol) which were combined and heated in a microwave vial to 180° C. for 2 hours. The reaction mixture was taken up in dichloromethane and purified by silica gel chromatography 0-10% methanol in dichloromethane to afford a clear oil (37%). 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 8.20 (s, 1H), 8.11 (s, 1H), 7.29 (m, 1H), 3.25 (bm, 4H), 2.58 (bm, 4H), 2.35 (s, 3H). 108b) [5-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyrazin-2-yl]-[5-(4-methyl-piperazin-1-yl)-pyridin-3-yl]-amine was prepared from 5-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyrazin-2-ylamine and 1-(5-bromo-pyridin-3-yl)-4-methyl-piperazine in a manner analogous to Step 2d and was isolated as an off-white lyophilate (4% yield). 1H NMR (400 MHz, CDCl3, δ, ppm): 10.5 (bs, 1H), 9.86 (bs, 1H), 9.22 (s, 1H), 8.49 (s, 1H), 8.40 (d, J=7.9 Hz, 2H), 8.35 (s, 1H), 8.19 (d, J=7.6 Hz, 2H), 8.05 (d, J=16.5 Hz, 2H), 3.84 (bm, 2H), 3.55 (bm, 2H), 3.38 (s, 3H), 3.20 (bm, 2H), 3.09 (bm, 2H), 2.88 (s, 3H). MS=465.1 (MH)+.

Workup

  1. customwas isolated as an off-white lyophilate (4% yield)

Sources & evidence

ORD record
ord-8f9749ac78f443c4a1344e1174ea0282
Source dataset
uspto-grants-2013_08
Patent number
US08501936B2

Reaction notes

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