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

HRID 844882Notes

Reaction equation

HRID 844882 reaction equation
[CH3:1][O:2][C:3](=[O:25])[C@H:4]([CH2:6][C:7]1[CH:12]=[CH:11][C:10]([C:13]2[C:14](=[O:23])[N:15]([CH3:22])[C:16](=[O:21])[N:17]([CH3:20])[C:18]=2[CH3:19])=[C:9]([CH3:24])[CH:8]=1)[NH2:5].[Cl:26][C:27]1[CH:35]=[CH:34][CH:33]=[C:32]([Cl:36])[C:28]=1[C:29](Cl)=[O:30].C(N(C(C)C)CC)(C)C>ClCCl>[CH3:1][O:2][C:3](=[O:25])[C@H:4]([CH2:6][C:7]1[CH:12]=[CH:11][C:10]([C:13]2[C:14](=[O:23])[N:15]([CH3:22])[C:16](=[O:21])[N:17]([CH3:20])[C:18]=2[CH3:19])=[C:9]([CH3:24])[CH:8]=1)[NH:5][C:29]([C:28]1[C:27]([Cl:26])=[CH:35][CH:34]=[CH:33][C:32]=1[Cl:36])=[O:30]

Participants

5

Reactant 3

HCID 783922,6-Dichlorobenzoyl chlorideHCID 81531DiisopropylethylamineHCID 693365974-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-3-methyl-L-phenylalanine methyl ester

Product 1

HCID 69337580N-[(2,6-dichlorophenyl)carbonyl]-4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-3-methyl-L-phenylalanine methyl esterYield 48%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a suspension of 4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-3-methyl-L-phenylalanine methyl ester (0.089 mmol, 34 mg) and 2,6-dichlorobenzoyl chloride (0.1 mmol, 21 mg) in dichloromethane (2 mL) was added diisopropylethylamine (0.4 mmol, 70 uL) at room temperature. After 5 min, everything went into solution and the clear yellow solution was stirred for 15 h at room temperature. The resulting brown solution was diluted with dichloromethane (25 mL). The dichloromethane layer was washed successively with 1N hydrochloric acid (2×25 mL), saturated sodium bicarbonate solution (25 mL), and brine solution (25 mL) and was 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 (40m) column to afford 22 mg (48% yield) of N-[(2,6-dichlorophenyl)carbonyl]-4-(1,3,6-trimethyl-2,4-dioxo-5-pyrimidinyl)-3-methyl-L-phenylalanine methyl ester as a viscous oil. ES-HRMS m/e calcd for C25H25Cl2N3O5 (M+Na) 541.1065, found 541.1063.

Workup

  1. washThe dichloromethane layer was washed successively with 1N hydrochloric acid (2×25 mL), saturated sodium bicarbonate solution (25 mL), and brine solution (25 mL)
  2. dry with materialwas dried over anhydrous magnesium sulfate
  3. filtrationFiltration of the drying agent and concentration of the solvent
  4. customgave the crude product which
  5. customwas purified by silica gel chromatography

Sources & evidence

ORD record
ord-792dac0699704cc5801ae17c7a5eb48c
Source dataset
uspto-grants-2002_04
Patent number
US06380387B1

Reaction notes

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