2-Chlorobenzylamine → (2-Chloro-benzyl)-{4-[8-(4-methyl-piperazin-1-yl)-imidazo[1,2-a]pyrazin-3-yl]-pyrimidin-2-yl}-amine

HRID 1186512Notes

Reaction equation

HRID 1186512 reaction equation
CS([C:5]1[N:10]=[C:9]([C:11]2[N:15]3[CH:16]=[CH:17][N:18]=[C:19]([N:20]4[CH2:25][CH2:24][N:23]([CH3:26])[CH2:22][CH2:21]4)[C:14]3=[N:13][CH:12]=2)[CH:8]=[CH:7][N:6]=1)(=O)=O.[Cl:27][C:28]1[CH:35]=[CH:34][CH:33]=[CH:32][C:29]=1[CH2:30][NH2:31]>>[Cl:27][C:28]1[CH:35]=[CH:34][CH:33]=[CH:32][C:29]=1[CH2:30][NH:31][C:5]1[N:10]=[C:9]([C:11]2[N:15]3[CH:16]=[CH:17][N:18]=[C:19]([N:20]4[CH2:25][CH2:24][N:23]([CH3:26])[CH2:22][CH2:21]4)[C:14]3=[N:13][CH:12]=2)[CH:8]=[CH:7][N:6]=1

Participants

3

Reactant 2

HCID 666482-ChlorobenzylamineHCID 682264863-(2-Methanesulfonyl-pyrimidin-4-yl)-8-(4-methyl-piperazin-1-yl)-imidazo[1,2-a]pyrazine

Product 1

HCID 66548630(2-Chloro-benzyl)-{4-[8-(4-methyl-piperazin-1-yl)-imidazo[1,2-a]pyrazin-3-yl]-pyrimidin-2-yl}-amine

Conditions

Temperature
140 °C

Procedure

The mixture of 3-(2-methanesulfonyl-pyrimidin-4-yl)-8-(4-methyl-piperazin-1-yl)-imidazo[1,2-a]pyrazine (from Example 46 supra) (150 mg, 0.402 mmol) and 2-chlorobenzylamine (228 mg, 1.608 mmol) was heated at 140° C. with stirring for 2 hours. The oil was purified by chromatography (silica gel, 10 g, 200˜300 mesh, eluting with dichloromethane:methanol, 30:1˜10:1) to afford the crude product (90 mg). The crude product was purified by prep-HPLC. Several drops of concentrated HCl were added to the fractions with product. After sonicating for several minutes, solution was concentrated under reduced pressure to afford (2-chloro-benzyl)-{4-[8-(4-methyl-piperazin-1-yl)-imidazo[1,2-a]pyrazin-3-yl]-pyrimidin-2-yl}-amine; hydrochloride. (Yield 25 mg, 14.3%). 1H NMR (300 MHz, CD3OD): δ 8.62 (s, 1H), 8.58 (s, 1H), 8.25 (s, 1H), 7.52-7.38 (m, 4H), 7.23 (brs, 2H), 5.49-5.45 (m, 2H), 4.87 (brs, 2H), 3.56 (brs, 4H), 3.24 (brs, 2H), 2.87 (s, 3H). LC-MS: [M+H]+ 435.

Workup

  1. customThe oil was purified by chromatography (silica gel, 10 g, 200˜300 mesh, eluting with dichloromethane:methanol, 30:1˜10:1)
  2. customto afford the crude product (90 mg)
  3. customThe crude product was purified by prep-HPLC
  4. additionSeveral drops of concentrated HCl were added to the fractions with product
  5. customAfter sonicating for several minutes
  6. concentrationsolution was concentrated under reduced pressure

Sources & evidence

ORD record
ord-f297d6b4646c4dc4a0fc9996f4aca4b2
Source dataset
uspto-grants-2014_03
Patent number
US08673905B2

Reaction notes

Loading…