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Dimethylformamide → N-Boc-trans-4-tosyloxy-L-proline methyl ester

HRID 490570
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 490570
[CH3:1][O:2][C:3](=[O:17])[C@@H:4]1[CH2:8][C@@H:7]([OH:9])[CH2:6][N:5]1[C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11].[CH3:18][C:19]1[CH:24]=[CH:23][C:22]([S:25](Cl)(=[O:27])=[O:26])=[CH:21][CH:20]=1.CN(C=O)C>N1C=CC=CC=1.C(Cl)Cl>[CH3:1][O:2][C:3]([CH:4]1[CH2:8][CH:7]([O:9][S:25]([C:22]2[CH:23]=[CH:24][C:19]([CH3:18])=[CH:20][CH:21]=2)(=[O:27])=[O:26])[CH2:6][N:5]1[C:10]([O:12][C:13]([CH3:14])([CH3:16])[CH3:15])=[O:11])=[O:17]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 3

HCID 6228DimethylformamideHCID 73974-Toluenesulfonyl chlorideHCID 2734883(2S,4R)-4-Hydroxypyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester

Produkt 1

HCID 13425771N-Boc-trans-4-tosyloxy-L-proline methyl ester

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 1049PyridineLösungsmittel
HCID 6344
Dichloromethane
Lösungsmittel

Versuchsvorschrift

To a solution of trans-N-Boc-4-hydroxy-L-proline methyl ester (7) in pyridine and dry DCM at 0° C. is added 4-methyl-benzenesulfonyl chloride. After adding, the mixture is refluxed overnight. The solvent is evaporated and then the residue is dissolved in CH2Cl2. After removal of solvent, the crude 4-(toluene-4-sulfonyloxy)-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester is obtained, which is used in the following reaction without further purification. To a solution of 4-(toluene-4-sulfonyloxy)-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester thus obtained above in dry DMF is added NaN3 in one portion, and the reaction mixture is stirred at about 50° C. for 5 h. The resulting mixture is purified to give 4-azido-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester (8).

Aufarbeitung

  1. additionAfter adding
  2. temperaturethe mixture is refluxed overnight
  3. customThe solvent is evaporated
  4. dissolutionthe residue is dissolved in CH2Cl2
  5. customAfter removal of solvent
  6. customthe crude 4-(toluene-4-sulfonyloxy)-pyrrolidine-1,2-dicarboxylic acid 1-tert-butyl ester 2-methyl ester is obtained
  7. customwhich is used in the following reaction without further purification

Quellen und Nachweise

ORD-Eintrag
ord-9c15454bdc8c42888c4c4ab6537db2ab
Quelldatensatz
uspto-grants-2009_05
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07528136B2

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