tert-Butanol → tert-butyl (S)-3-[tert-butoxycarbonyl-[(R)-1-(naphthalen-1-yl)ethyl]amino]pyrrolidine-1-carboxylate

HRID 1811649

Reaktionsgleichung

Reaktionsgleichung von HRID 1811649
[Ca].Cl[C:3]([N:5]([C@@H:18]([C:20]1[C:29]2[C:24](=[CH:25][CH:26]=[CH:27][CH:28]=2)[CH:23]=[CH:22][CH:21]=1)[CH3:19])[C@H:6]1[CH2:10][CH2:9][N:8]([C:11]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])[CH2:7]1)=[O:4].[C:30]([OH:34])([CH3:33])([CH3:32])[CH3:31]>>[C:30]([O:34][C:3]([N:5]([C@@H:18]([C:20]1[C:29]2[C:24](=[CH:25][CH:26]=[CH:27][CH:28]=2)[CH:23]=[CH:22][CH:21]=1)[CH3:19])[C@H:6]1[CH2:10][CH2:9][N:8]([C:11]([O:13][C:14]([CH3:17])([CH3:15])[CH3:16])=[O:12])[CH2:7]1)=[O:4])([CH3:33])([CH3:32])[CH3:31]

Komponenten

4

Edukt 3

HCID 6386tert-ButanolHCID 5460341CalciumHCID 58973541tert-butyl(S)-3-[chlorocarbonyl-[(R)-1-(naphthalen-1-yl)ethyl]amino]pyrrolidine-1-carboxylate

Produkt 1

HCID 58973479tert-butyl (S)-3-[tert-butoxycarbonyl-[(R)-1-(naphthalen-1-yl)ethyl]amino]pyrrolidine-1-carboxylate

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a solution of 14.9 g of triphosgene dissolved in 400 ml of methylene chloride was added dropwise a solution containing 25.68 g of tert-butyl(R)-3-[1-(naphthalen-1-yl)ethylamino]pyrrolidine-1-carboxylate (the compound obtained in the above-mentioned Reference example 1.005 (1)) and 31.5 ml of triethylamine in 100 ml of methylene chloride at −20° C. Further, 7.5 g of triphosgene was added to the same, and the mixture was stirred at room temperature for 30 minutes. Water was added to the reaction mixture, the mixture was stirred and the liquids were separated. The organic layer was dried, the solvent was evaporated, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate=6:1→2:1) to obtain 10.63 g of tert-butyl(S)-3-[chlorocarbonyl-[(R)-1-(naphthalen-1-yl)ethyl]amino]pyrrolidine-1-carboxylate and 9.22 g of tert-butyl(R)-3-[chlorocarbonyl-[(R)-1-(naphthalen-1-yl)ethyl]amino]pyrrolidine-1-carboxylate shown in the following Reference example Table, respectively. (2) To 18.52 g of tert-butyl(S)-3-[chlorocarbonyl-[(R)-1-(naphthalen-1-yl)ethyl]amino]pyrrolidine-1-carboxylate was added 1.0 liter of tert-butanol, and the mixture was stirred at 60° C. for 2 days. The reaction mixture was concentrated, and then, the residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1) to obtain 9.24 g of tert-butyl(S)-3-[tert-butoxycarbonyl-[(R)-1-(naphthalen-1-yl)ethyl]amino]pyrrolidine-1-carboxylate (the following Reference example 1.006(a)).

Aufarbeitung

  1. concentrationThe reaction mixture was concentrated
  2. customthe residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1)

Quellen und Nachweise

ORD-Eintrag
ord-0c8cbc54c1064a1c9053959024f87c80
Quelldatensatz
uspto-grants-2013_01
Patentnummer
US08362274B2

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