1-Methylpiperazine → HCID 21894727, compound

HRID 720784Notes

Reaction equation

HRID 720784 reaction equation
[F:1][C:2]1[CH:24]=[CH:23][C:5]([O:6][C:7]2[CH:8]=[C:9]3[C:13](=[CH:14][C:15]=2[C:16]([NH2:18])=[O:17])[N:12]([CH2:19][CH:20]([CH3:22])[CH3:21])[N:11]=[CH:10]3)=[CH:4][CH:3]=1.C(N1C=CN=C1)(N1C=CN=C1)=O.[CH3:37][N:38]1[CH2:43][CH2:42]N[CH2:40][CH2:39]1>C1COCC1>[F:1][C:2]1[CH:24]=[CH:23][C:5]([O:6][C:7]2[CH:8]=[C:9]3[C:13](=[CH:14][C:15]=2[C:16]([N:18]2[CH2:42][CH2:43][N:38]([CH3:37])[CH2:39][CH2:40]2)=[O:17])[N:12]([CH2:19][CH:20]([CH3:22])[CH3:21])[N:11]=[CH:10]3)=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 531671-MethylpiperazineHCID 682631,1'-CarbonyldiimidazoleHCID 574187391h-Indazole-6-carboxamide,5-(4-fluorophenoxy)-1-(2-methylpropyl)-2×

Product 1

HCID 21894727HCID 21894727, compoundYield 95%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of 5-(4-fluorophenoxy)-1-isobutyl-1H-indazole-6-carboxylic acid (compound 10g, prepared as described in Example 46) in THF was treated with carbonyldiimidazole (1.2 equivalents) at room temperature under nitrogen atmosphere. After stirring for 18 hours, the reaction was treated with 1-methyl-piperazine (1 equivalent). After an additional 18 hours, the solvent was allowed to slowly evaporate and the residue was purified in a Sep Pak cartridge eluting with a gradient of 100% CH2Cl2 to 5% MeOH/CH2Cl2 to provide compound 11g-3 as an oil in 95% yield.

Workup

  1. waitAfter an additional 18 hours
  2. customto slowly evaporate
  3. customthe residue was purified in a Sep Pak cartridge
  4. washeluting with a gradient of 100% CH2Cl2 to 5% MeOH/CH2Cl2
  5. customto provide compound 11g-3 as an oil in 95% yield

Sources & evidence

ORD record
ord-3938aeb24d9a461390fbd4dd52f5f71a
Source dataset
uspto-grants-2006_11
Patent number
US07135575B2

Reaction notes

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