3-Hydroxyisovaleric acid → Tak-285

HRID 1786987Notes

Reaction equation

HRID 1786987 reaction equation
Cl.Cl.[NH2:3][CH2:4][CH2:5][N:6]1[C:14]2[C:13]([NH:15][C:16]3[CH:21]=[CH:20][C:19]([O:22][C:23]4[CH:28]=[CH:27][CH:26]=[C:25]([C:29]([F:32])([F:31])[F:30])[CH:24]=4)=[C:18]([Cl:33])[CH:17]=3)=[N:12][CH:11]=[N:10][C:9]=2[CH:8]=[CH:7]1.[OH:34][C:35]([CH3:41])([CH3:40])[CH2:36][C:37](O)=[O:38].Cl.C(N=C=NCCCN(C)C)C.O.ON1C2C=CC=CC=2N=N1>O.CN(C)C=O.C(N(CC)CC)C>[Cl:33][C:18]1[CH:17]=[C:16]([NH:15][C:13]2[C:14]3[N:6]([CH2:5][CH2:4][NH:3][C:37](=[O:38])[CH2:36][C:35]([OH:34])([CH3:41])[CH3:40])[CH:7]=[CH:8][C:9]=3[N:10]=[CH:11][N:12]=2)[CH:21]=[CH:20][C:19]=1[O:22][C:23]1[CH:28]=[CH:27][CH:26]=[C:25]([C:29]([F:32])([F:31])[F:30])[CH:24]=1

Participants

8

Reactant 4

HCID 693623-Hydroxyisovaleric acidHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27960291-Hydroxybenzotriazole hydrateHCID 568513565-(2-aminoethyl)-N-{3-chloro-4-[3-(trifluoromethyl)phenoxy]phenyl}-5H-pyrrolo[3,2-d]pyrimidin-4-amine dihydrochloride

Product 1

HCID 11620908Tak-285Yield 77.3%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8471TriethylamineSolvent

Procedure

A mixture of 5-(2-aminoethyl)-N-{3-chloro-4-[3-(trifluoromethyl)phenoxy]phenyl}-5H-pyrrolo[3,2-d]pyrimidin-4-amine dihydrochloride (150 mg), 3-hydroxy-3-methylbutyric acid (68 mg), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (166 mg), 1-hydroxybenzotriazole monohydrate (133 mg), triethylamine (0.40 mL) and N,N-dimethylformamide (5.0 mL) was stirred at room temperature for 5 days. Water was added to the reaction system and the mixture was extracted with ethyl acetate. The organic layer washed with water and saturated brine and dried over magnesium sulfate. After concentration under reduced pressure, the residue was separated and purified by basic silica gel column chromatography (eluent, ethyl acetate→ethyl acetate:methanol=9:1). Crystallization from ethyl acetate-diisopropyl ether gave the title compound (122 mg) as colorless crystals.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer washed with water and saturated brine
  3. dry with materialdried over magnesium sulfate
  4. concentrationAfter concentration under reduced pressure
  5. customthe residue was separated
  6. custompurified by basic silica gel column chromatography (eluent, ethyl acetate→ethyl acetate:methanol=9:1)
  7. customCrystallization from ethyl acetate-diisopropyl ether

Sources & evidence

ORD record
ord-1df4735396ea4b2083cad97a8c0dd483
Source dataset
uspto-grants-2009_03
Patent number
US07507740B2

Reaction notes

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