Trifluoroacetic acid → Caprine

HRID 2255748Notes

Reaction equation

HRID 2255748 reaction equation
C([O:5][C:6](=[O:13])[C@H:7]([CH2:9][CH2:10][CH2:11][CH3:12])[NH2:8])(C)(C)C.C(O)(C(F)(F)F)=O>ClCCl.C(OCC)C>[NH2:8][C@H:7]([C:6]([OH:13])=[O:5])[CH2:9][CH2:10][CH2:11][CH3:12]

Participants

5

Reactant 2

HCID 6422Trifluoroacetic acidHCID 12451446tert-butyl (2S)-2-aminohexanoate

Product 1

HCID 21236Caprine

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6344DichloromethaneSolvent

Procedure

25.8 mg of the isomer having a high Rf value of L-N-[(2R or S)-5-ethylsulfonyl-2-(1-naphthylmethyl)-pentanoyl]norleucine tert-butyl ester was dissolved in 0.2 ml of dichloromethane. Then, 0.1 ml of TFA was added thereto, and the mixture was stirred at room temperature for 4 hours. Then, the reaction solution was concentrated under reduced pressure. The residue thereby obtained was diluted with diethyl ether and concentrated under reduced pressure. This operation was repeated to obtain 22.9 mg of L-N-[(2R or S)-5-ethylsulfonyl-2-(1-naphthylmethyl)-pentanoyl]norleucine.

Workup

  1. concentrationThen, the reaction solution was concentrated under reduced pressure
  2. customThe residue thereby obtained
  3. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-122a685bbf6841babf4f17cef6464ff8
Source dataset
uspto-grants-1993_08
Patent number
US05240924

Reaction notes

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