Diisopropylethylamine → N-[(2-chloro-6-methylphenyl)carbonyl]-4-(1,4-dimethyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester

HRID 895914Notes

Reaction equation

HRID 895914 reaction equation
Cl.[CH3:2][O:3][C:4](=[O:23])[C@H:5]([CH2:7][C:8]1[CH:13]=[CH:12][C:11]([C:14]2[C:15](=[O:22])[N:16]([CH3:21])[CH:17]=[CH:18][C:19]=2[CH3:20])=[CH:10][CH:9]=1)[NH2:6].[Cl:24][C:25]1[CH:33]=[CH:32][CH:31]=[C:30]([CH3:34])[C:26]=1[C:27](O)=[O:28].CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CN(C=O)C.O>[CH3:2][O:3][C:4](=[O:23])[C@H:5]([CH2:7][C:8]1[CH:9]=[CH:10][C:11]([C:14]2[C:15](=[O:22])[N:16]([CH3:21])[CH:17]=[CH:18][C:19]=2[CH3:20])=[CH:12][CH:13]=1)[NH:6][C:27]([C:26]1[C:30]([CH3:34])=[CH:31][CH:32]=[CH:33][C:25]=1[Cl:24])=[O:28]

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 888702-Chloro-6-methylbenzoic acidHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 697162244-(1,4-dimethyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester hydrochloride salt

Product 1

HCID 69716482N-[(2-chloro-6-methylphenyl)carbonyl]-4-(1,4-dimethyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl esterYield 27%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a suspension of 4-(1,4-dimethyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester hydrochloride salt (68 mg, 0.2 mmol), 2-chloro-6-methylbenzoic acid (45 mg, 0.25 mmol) and HBTU (95 mg, 0.25 mmol) in DMF (1.5 mL) was added DIEA (174 μL, 1.0 mmol) at room temperature. The resulting solution was stirred for 72 h, the mixture was poured into water (25 mL) and was extracted with ethyl acetate (2×15 mL). The combined ethyl acetate extracts were washed successively with 0.5 N HCl (25 mL), saturated NaHCO3 solution (25 mL), brine solution (25 mL) and were dried over anhydrous magnesium sulfate. Filtration of the drying agent and concentration of the solvent gave the crude product, which was purified by silica gel chromatography using a Biotage (40 s) column to afford 24 mg (27% yield) of N-[(2-chloro-6-methylphenyl)carbonyl]-4-(1,4-dimethyl-2-oxo-3-pyridinyl)-L-phenylalanine methyl ester as an amorphous white solid. ES-HRMS m/e calcd for C25H25ClN2O4 (M+Na) 475.1395. found 475.1400. b) Preparation of N-[(2-chloro-6-methylphenyl)carbonyl]-4-(1,4-dimethyl-2-oxo-3-pyridinyl)-L-phenylalanine

Workup

  1. extractionwas extracted with ethyl acetate (2×15 mL)
  2. washThe combined ethyl acetate extracts were washed successively with 0.5 N HCl (25 mL), saturated NaHCO3 solution (25 mL), brine solution (25 mL)
  3. dry with materialwere dried over anhydrous magnesium sulfate
  4. filtrationFiltration of the drying agent and concentration of the solvent
  5. customgave the crude product, which
  6. customwas purified by silica gel chromatography
  7. customa Biotage (40 s) column

Sources & evidence

ORD record
ord-bd8a5c9c39a54d4c88818ac0b02ce8f2
Source dataset
uspto-grants-2005_07
Patent number
US06916933B2

Reaction notes

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