Potassium Iodide → 3-[2-[4-[[3-[(4-fluorophenyl)methyl]-3H-imidazo[4,5-b]-pyridin-2-yl]amino)-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one dihydrochloride

HRID 2309519Notes

Reaction equation

HRID 2309519 reaction equation
[Cl:1][CH2:2][CH2:3][C:4]1[C:9](=[O:10])[N:8]2[CH:11]=[CH:12][CH:13]=[CH:14][C:7]2=[N:6][C:5]=1[CH3:15].[ClH:16].Cl.[F:18][C:19]1[CH:24]=[CH:23][C:22]([CH2:25][N:26]2[C:30]3=[N:31][CH:32]=[CH:33][CH:34]=[C:29]3[N:28]=[C:27]2[NH:35][CH:36]2[CH2:41][CH2:40][NH:39][CH2:38][CH2:37]2)=[CH:21][CH:20]=1.C(=O)([O-])[O-].[Na+].[Na+].[I-].[K+]>CN(C)C=O>[ClH:1].[ClH:16].[F:18][C:19]1[CH:24]=[CH:23][C:22]([CH2:25][N:26]2[C:30]3=[N:31][CH:32]=[CH:33][CH:34]=[C:29]3[N:28]=[C:27]2[NH:35][CH:36]2[CH2:37][CH2:38][N:39]([CH2:2][CH2:3][C:4]3[C:9](=[O:10])[N:8]4[CH:11]=[CH:12][CH:13]=[CH:14][C:7]4=[N:6][C:5]=3[CH3:15])[CH2:40][CH2:41]2)=[CH:21][CH:20]=1

Participants

6

Reactant 4

HCID 4875Potassium IodideHCID 10340Sodium CarbonateHCID 8178663-(2-Chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-oneHCID 198907313-(4-fluorophenylmethyl)-N-(4-piperidinyl)-3H-imidazo[4,5-b]pyridin-2-amine dihydrochloride

Product 1

HCID 139831783-[2-[4-[[3-[(4-fluorophenyl)methyl]-3H-imidazo[4,5-b]-pyridin-2-yl]amino)-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one dihydrochlorideYield 60%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
70 °C

Procedure

A mixture of 3.34 parts of 3-(2-chloroethyl)-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one, 6 parts of 3-(4-fluorophenylmethyl)-N-(4-piperidinyl)-3H-imidazo[4,5-b]pyridin-2-amine dihydrochloride, 4.8 parts of sodium carbonate, 0.1 parts of potassium iodide and 135 parts of N,N-dimethylformamide was stirred and heated overnight at 70° C. The reaction mixture was poured onto water. The product was extracted with trichloromethane. The extract was dried, filtered and evaporated. The residue was purified by column-chromatography over silica gel using a mixture of trichlormethane and methanol, saturated with ammonia, (96:4 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from acetonitrile, yielding 4 parts (60%) of 3-[2-[4-[[3-[(4-fluorophenyl)methyl]-3H-imidazo[4,5-b]-pyridin-2-yl]amino]-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one dihydrochloride; mp. 195.7° C. (compound 22).

Workup

  1. additionThe reaction mixture was poured onto water
  2. extractionThe product was extracted with trichloromethane
  3. customThe extract was dried
  4. filtrationfiltered
  5. customevaporated
  6. customThe residue was purified by column-chromatography over silica gel using
  7. additiona mixture of trichlormethane and methanol
  8. customThe pure fractions were collected
  9. customthe eluent was evaporated
  10. customThe residue was crystallized from acetonitrile

Sources & evidence

ORD record
ord-68e3435d215f493b8e8116171fcac7db
Source dataset
uspto-grants-1987_09
Patent number
US04695569

Reaction notes

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