Dichloromethane → diethyl N-(4-bromobenzoyl)-L-glutamate

HRID 704868

Reaktionsgleichung

Reaktionsgleichung von HRID 704868
[Br:1][C:2]1[CH:10]=[CH:9][C:5]([C:6](Cl)=[O:7])=[CH:4][CH:3]=1.[NH2:11][C@H:12]([C:20]([O:22][CH2:23][CH3:24])=[O:21])[CH2:13][CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16].C(Cl)Cl>C(N(CC)CC)C>[Br:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([NH:11][C@H:12]([C:20]([O:22][CH2:23][CH3:24])=[O:21])[CH2:13][CH2:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[O:7])=[CH:4][CH:3]=1

Komponenten

5

Edukt 3

HCID 6344DichloromethaneHCID 685154-Bromobenzoyl chlorideHCID 73961Glutamic acid diethyl ester

Produkt 1

HCID 2210654diethyl N-(4-bromobenzoyl)-L-glutamate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8471TriethylamineLösungsmittel

Versuchsvorschrift

To a mixture of 0.92 g of 4-bromobenzoyl chloride and 1.0 g of diethyl L-glutamate in 50 ml to dry methylene chloride is added 1.16 ml of triethylamine. The reaction mixture is stirred overnight under nitrogen. After a standard workup, the methylene chloride solution is concentrated under reduced pressure, and the residue recrystallized from hexanes to give 0.68 g (46%) of analytically pure diethyl N-(4-bromobenzoyl)-L-glutamate as a white solid: m.p. 82.5°-83.5° C.; NMR (CDCl3, 300 MHz) delta 1.26 (t, 3H, J=6.9 Hz), 1.33 (t, 3H, J=6.9 Hz), 2.11-2.60 (m, 4H), 4.14 (q, 2H, J=6.9 Hz), 4.27 (q, 2H, J=6.9 Hz) 4.78 (m, 1H), 7.14 (d, 1H, J=7.2 Hz), 7.61 (d, 2H, J=8.4 Hz), 7.73 (d, 2H, J=8.4 Hz); IR (KBr) 3320, 2980, 1745, 1720, 1635, 1520, 1375, 1300, and 1200 cm-1. Anal. Calcd. for C16H20BrNO5 : C, 49.75; H, 5.22; N, 3.63; Br, 20.69. Found: C, 49.70; H, 5.15; N, 3.65; Br, 20.90.

Aufarbeitung

  1. concentrationAfter a standard workup, the methylene chloride solution is concentrated under reduced pressure
  2. customthe residue recrystallized from hexanes

Quellen und Nachweise

ORD-Eintrag
ord-e06e2a028f9f475eb5c41af345b115e9
Quelldatensatz
uspto-grants-1991_01
Patentnummer
US04988813

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