Benzyl chloroformate → 1-Benzyloxycarbonyl-4-(S)-(1-ethoxycarbonylcyclopropyl)-3-(S)-fluoropyrrolidine

HRID 635105Notes

Reaction equation

HRID 635105 reaction equation
[CH2:1]([O:3][C:4]([C:6]1([C@H:9]2[CH2:13][N:12]([C@H](C3C=CC=CC=3)C)[CH2:11][C@H:10]2[F:22])[CH2:8][CH2:7]1)=[O:5])[CH3:2].Cl[C:24]([O:26][CH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[O:25]>ClCCl>[CH2:27]([O:26][C:24]([N:12]1[CH2:13][C@H:9]([C:6]2([C:4]([O:3][CH2:1][CH3:2])=[O:5])[CH2:8][CH2:7]2)[C@H:10]([F:22])[CH2:11]1)=[O:25])[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1

Participants

4

Reactant 2

HCID 10387Benzyl chloroformateHCID 109687574-(S)-(1Ethoxycarbonylcyclopropyl)-3-(S)-fluoro-1-[1-(S)-phenylethyl]pyrrolidine

Product 1

HCID 110350361-Benzyloxycarbonyl-4-(S)-(1-ethoxycarbonylcyclopropyl)-3-(S)-fluoropyrrolidineYield 83.7%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

4-(S)-(1-Ethoxycarbonylcyclopropyl)-3-(S)-fluoro-1-(1-(S)-phenylethyl]pyrrolidine (5.08 g, 16.63 mmol) was dissolved in dry dichloromethane (50 ml). Under ice cooling, benzyl chloroformate (3.56 ml, 25.0 mmol) was added dropwise into this solution. Then the liquid reaction mixture was heated under reflux for 1 hour and dichioromethane was evaporated under reduced pressure. The residue was subjected. to flash silica gel column chromatography (eluent: n-hexane:ethyl acetate=3:1) to obtain 4.67 g (83.7%) of the title compound as a colorless oily substance.

Workup

  1. customThen the liquid reaction mixture
  2. temperaturewas heated
  3. temperatureunder reflux for 1 hour
  4. customdichioromethane was evaporated under reduced pressure

Sources & evidence

ORD record
ord-42cff8cd194040a9b8ad4c7e0533a4bc
Source dataset
uspto-grants-2001_02
Patent number
US06184388B2

Reaction notes

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