Water → N-[(2,6-dichlorophenyl)carbonyl]-4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-L-phenylalanine ethyl ester

HRID 844884Notes

Reaction equation

HRID 844884 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([Cl:8])[C:3]=1[C:9]([NH:11][C@H:12]([C:31]([OH:33])=[O:32])[CH2:13][C:14]1[CH:19]=[CH:18][C:17]([C:20]2[C:21](=[O:30])[N:22]([CH3:29])[C:23](=[O:28])[N:24]([CH3:27])[C:25]=2[CH3:26])=[CH:16][CH:15]=1)=[O:10].C(=O)(O)[O-].[Na+].I[CH2:40][CH3:41].O>CN(C=O)C>[CH2:40]([O:32][C:31](=[O:33])[C@H:12]([CH2:13][C:14]1[CH:15]=[CH:16][C:17]([C:20]2[C:21](=[O:30])[N:22]([CH3:29])[C:23](=[O:28])[N:24]([CH3:27])[C:25]=2[CH3:26])=[CH:18][CH:19]=1)[NH:11][C:9]([C:3]1[C:2]([Cl:1])=[CH:7][CH:6]=[CH:5][C:4]=1[Cl:8])=[O:10])[CH3:41]

Participants

6

Reactant 4

HCID 962WaterHCID 6340IodoethaneHCID 516892Sodium BicarbonateHCID 69337248N-[(2,6-dichlorophenyl)carbonyl]-4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-L-phenylalanine

Product 1

HCID 10118739N-[(2,6-dichlorophenyl)carbonyl]-4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-L-phenylalanine ethyl esterYield 50%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a suspension of N-[(2,6-dichlorophenyl)carbonyl]-4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-L-phenylalanine (0.6 mmol, 300 mg) and sodium bicarbonate (3.6 mmol, 302 mg) in DMF (4 mL) was added iodoethane (3.6 mmol, 0.29 mL) at room temperature. The mixture was stirred for 72 h at room temperature. Then, the reaction mixture was poured into water (50 mL) and was extracted with ethyl acetate (3×20 mL). The combined extracts were washed with brine solution (60 mL) and were dried over anhydrous magnesium sulfate. Filtration of the drying agent and concentration of the filtrate gave the crude product which was purified by silica gel chromatography using a Biotage (40m) column to obtain 155 mg (50% yield) of N-[(2,6-dichlorophenyl)carbonyl]-4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-L-phenylalanine ethyl ester as a crystalline white solid: mp 262-265° C. ES-HRMS m/e calcd for C25H25Cl2N3O5 (M+Na) 540.1062, found 540.1049.

Workup

  1. extractionwas extracted with ethyl acetate (3×20 mL)
  2. washThe combined extracts were washed with brine solution (60 mL)
  3. dry with materialwere dried over anhydrous magnesium sulfate
  4. filtrationFiltration of the drying agent and concentration of the filtrate
  5. customgave the crude product which
  6. customwas purified by silica gel chromatography

Sources & evidence

ORD record
ord-81e76881616d4ba29ed7632eed3f6520
Source dataset
uspto-grants-2002_04
Patent number
US06380387B1

Reaction notes

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