2,6-Dichlorobenzoyl chloride → (S)-2-tert-butoxycarbonylamino-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid methyl ester

HRID 1282603Notes

Reaction equation

HRID 1282603 reaction equation
[CH3:1][O:2][C:3](=[O:21])[C@H:4]([CH2:13][C:14]1[CH:19]=[CH:18][C:17]([NH2:20])=[CH:16][CH:15]=1)[NH:5][C:6]([O:8][C:9]([CH3:12])([CH3:11])[CH3:10])=[O:7].C(N(C(C)C)CC)(C)C.[Cl:31][C:32]1[CH:40]=[CH:39][CH:38]=[C:37]([Cl:41])[C:33]=1[C:34](Cl)=[O:35]>ClCCl.O>[CH3:1][O:2][C:3](=[O:21])[C@H:4]([CH2:13][C:14]1[CH:19]=[CH:18][C:17]([NH:20][C:34]([C:33]2[C:32]([Cl:31])=[CH:40][CH:39]=[CH:38][C:37]=2[Cl:41])=[O:35])=[CH:16][CH:15]=1)[NH:5][C:6]([O:8][C:9]([CH3:12])([CH3:10])[CH3:11])=[O:7]

Participants

6

Reactant 3

HCID 783922,6-Dichlorobenzoyl chlorideHCID 81531DiisopropylethylamineHCID 110118554-Amino-N-((1,1-dimethylethoxy)carbonyl)-L-phenylalanine methyl ester

Product 1

HCID 54393861(S)-2-tert-butoxycarbonylamino-3-[4-(2,6-dichlorobenzoylamino)phenyl]propionic acid methyl esterYield 100.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Procedure

To a solution of 4-(amino)-N-[(1,1-dimethylethoxy)carbonyl]-L-phenylalanine methyl ester (2.6 g, 8.6 mmol) in dichloromethane (20 mL) were added diisopropylethylamine (2.3 mL, 13 mmol) followed by 2,6-dichlorobenzoyl chloride (1.99 g, 9.5 mmol) at room temperature. The mixture was stirred for 15 h at which time a white precipitate was formed. The mixture was diluted with 30 mL of dichloromethane and 50 mL of water. The layers were separated and the aqueous layer was extracted with 100 mL (2×50 mL) of dichloromethane. The combined organic extracts were washed with brine and dried over anhydrous magnesium sulfate. Filtration and concentration of the solvent gave 4.03 g (quantitative) of 4-[[(2,6-dichlorophenyl)carbonyl]amino]-N-[(1,1-dimethylethoxy)carbonyl]-L-phenylalanine methyl ester as a white solid, mp 148-151° C.

Workup

  1. customwas formed
  2. customThe layers were separated
  3. extractionthe aqueous layer was extracted with 100 mL (2×50 mL) of dichloromethane
  4. washThe combined organic extracts were washed with brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationFiltration and concentration of the solvent

Sources & evidence

ORD record
ord-a9a8f4bb6699457482407730f8018858
Source dataset
uspto-grants-2002_09
Patent number
US06455550B1

Reaction notes

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