Dichloromethane → L-Tyrosine

HRID 904118Notes

Reaction equation

HRID 904118 reaction equation
C([NH:8][C@H:9]([C:18]([OH:20])=[O:19])[CH2:10][C:11]1[CH:16]=[CH:15][C:14]([OH:17])=[CH:13][CH:12]=1)(OC(C)(C)C)=O.C(Cl)Cl>CN(C)C=O>[NH2:8][C@H:9]([C:18]([OH:20])=[O:19])[CH2:10][C:11]1[CH:12]=[CH:13][C:14]([OH:17])=[CH:15][CH:16]=1

Participants

4

Reactant 2

HCID 6344DichloromethaneHCID 117439L-Tyrosine, N-(1,1-dimethylethoxy)carbonyl-

Product 1

HCID 6057L-Tyrosine

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

While maintaining the nitrogen gas atmosphere, 3 fold molar excess of Boc-L-Tyrosine (Vega, supra.) dissolved in dimethylformamide and adjusted to 15 ml. with the addition of methylene chloride is added to the product of Step (F) above and the resulting mixture shaken. After about 10 minutes, 3 fold molar excess of N,N-dicyclohexylcarbodiimide is added and the resulting mixture is shaken for 4.5 to 5 hours at room temperature. At the end of this period, the reaction mixture is filtered and the residue washed with dimethylformamide. The washed residue is dried.

Workup

  1. stirringthe resulting mixture is shaken for 4.5 to 5 hours at room temperature
  2. filtrationAt the end of this period, the reaction mixture is filtered
  3. washthe residue washed with dimethylformamide
  4. customThe washed residue is dried

Sources & evidence

ORD record
ord-45d28bb19871484ab98d086da5097e88
Source dataset
uspto-grants-1980_10
Patent number
US04230696

Reaction notes

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