Tosyl-L-phenylalanyl Chloride → HCID 21968760, compound

HRID 1108489Notes

Reaction equation

HRID 1108489 reaction equation
[OH:1][CH:2]([C:15]1[C:24]([CH3:25])=[CH:23][C:18]([C:19]([O:21][CH3:22])=[O:20])=[CH:17][C:16]=1[CH3:26])[C:3]1[CH:8]=[C:7]([N:9]2[CH:13]=[CH:12][N:11]=[CH:10]2)[CH:6]=[CH:5][C:4]=1[CH3:14].[CH3:27][C:28]1[CH:33]=[CH:32][C:31]([S:34]([NH:37][C@@H:38]([CH2:42][C:43]2[CH:48]=[CH:47][CH:46]=[CH:45][CH:44]=2)[C:39](Cl)=[O:40])(=[O:36])=[O:35])=[CH:30][CH:29]=1>ClC(Cl)C.N1C=CC=CC=1>[N:9]1([C:7]2[CH:6]=[CH:5][C:4]([CH3:14])=[C:3]([CH:8]=2)[CH:2]([C:15]2[C:16]([CH3:26])=[CH:17][C:18]([C:19]([O:21][CH3:22])=[O:20])=[CH:23][C:24]=2[CH3:25])[O:1][C:39](=[O:40])[C@@H:38]([NH:37][S:34]([C:31]2[CH:30]=[CH:29][C:28]([CH3:27])=[CH:33][CH:32]=2)(=[O:36])=[O:35])[CH2:42][C:43]2[CH:44]=[CH:45][CH:46]=[CH:47][CH:48]=2)[CH:13]=[CH:12][N:11]=[CH:10]1

Participants

5

Reactant 2

HCID 7019169Tosyl-L-phenylalanyl ChlorideHCID 10882640Methyl (+/-)-4-[alpha-hydroxy-5-(1-imidazolyl)-2-methylbenzyl]-3,5-dimethylbenzoate

Product 1

HCID 21968760HCID 21968760, compoundYield 100.5%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 63651,1-DichloroethaneSolvent2×

Procedure

Methyl (±)-4-[α-hydroxy-5-(1-imidazolyl)-2-methylbenzyl]-3,5-dimethylbenzoate (46 g) was suspended in dichloroethane (550 ml) and pyridine (15.8 ml), and a solution of (S)-2-(4-methylbenzenesulfonylamino)-3-phenylpropionyl chloride (53.2 g) in dichloroethane (125 ml) was added dropwise to the suspension over 10 minutes with stirring under ice-cooling. The mixture was stirred at room temperature for 4 hours, and the reaction mixture was washed successively with water, 5% citric acid, 5% potassium carbonate and water. The organic layer was separated and dried over magnesium sulfate. The solvent was evaporated under reduced pressure to give 86 g of methyl (±)-4-[5-(1-imidazolyl)-2-methyl-α-{(S)-2-(4-methylbenzenesulfonylamino)-3-phenylpropionyloxy}-benzyl]-3,5-dimethylbenzoate as a pale-yellow oil. This was crystallized from ethyl acetate (150 ml) and isopropyl ether (600 ml) and the obtained crystals were recrystallized from ethyl acetate (75 ml) and isopropyl ether (150 ml) to give 29.8 g of methyl (S)-4-[5-(1-imidazolyl)-2-methyl-α-{(S)-2-(4-methylbenzenesulfonylamino)-3-phenylpropionyloxy}benzyl]-3,5-dimethylbenzoate as white crystals, melting point 111-112° C.

Workup

  1. temperaturecooling
  2. stirringThe mixture was stirred at room temperature for 4 hours
  3. washthe reaction mixture was washed successively with water, 5% citric acid, 5% potassium carbonate and water
  4. customThe organic layer was separated
  5. dry with materialdried over magnesium sulfate
  6. customThe solvent was evaporated under reduced pressure

Sources & evidence

ORD record
ord-752c79351f404899a581459c2cf45403
Source dataset
uspto-grants-2000_05
Patent number
US06066739

Reaction notes

Loading…