Trifluoroacetic acid → HCID 23387520, compound

HRID 489036Notes

Reaction equation

HRID 489036 reaction equation
[C:1]([NH:11][C@H:12]([C:16]([O:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[CH2:25][C:26]([O:28]CC1C=CC(OC)=CC=1)=[O:27])=[O:17])[CH:13]([CH3:15])[CH3:14])([O:3][CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1)=[O:2].FC(F)(F)C(O)=O>ClCCl>[C:1]([NH:11][C@H:12]([C:16]([O:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][C:20]=1[CH2:25][C:26]([OH:28])=[O:27])=[O:17])[CH:13]([CH3:15])[CH3:14])([O:3][CH2:4][C:5]1[CH:10]=[CH:9][CH:8]=[CH:7][CH:6]=1)=[O:2]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 23387542HCID 23387542, compound

Product 1

HCID 23387520HCID 23387520, compoundYield 80.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

4-Methoxybenzyl 2-(N-CBz-L-valyloxy)phenylacetate (4.25 g, 8.4 mmol), was dissolved in dichloromethane (40 ml). Triflouroacetic acid (8 ml) was added with cooling on ice. The mixture was allowed to reach room temperature and stirred for 40 min. The solvent was removed under reduced pressure and the crude product was recrystallized twice (hexan-ethyl acetate+a small amount of dichloromethane) to give the title compound (2.6 g, 80%). The compound can be activated and esterified to a drug or further modified as described below.

Workup

  1. temperaturewith cooling on ice
  2. customto reach room temperature
  3. customThe solvent was removed under reduced pressure
  4. customthe crude product was recrystallized twice (hexan-ethyl acetate+a small amount of dichloromethane)

Sources & evidence

ORD record
ord-9a38d28735744f55a99185cc6fb431a3
Source dataset
uspto-grants-2005_12
Patent number
US06974802B2

Reaction notes

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