Iodoethane → (+/-)-3-tert-butoxycarbonyl-7-chloro-6-(1-cyanopropylthio)-2,3,4,5-tetrahydro-1H-benzo[d]azepine

HRID 911540Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 911540
[CH:1]([N-]C(C)C)(C)[CH3:2].[Li+].C1CCCCC1.[C:15]([O:19][C:20]([N:22]1[CH2:28][CH2:27][C:26]2[C:29]([S:34][CH2:35][C:36]#[N:37])=[C:30]([Cl:33])[CH:31]=[CH:32][C:25]=2[CH2:24][CH2:23]1)=[O:21])([CH3:18])([CH3:17])[CH3:16].C(I)C>C1COCC1>[C:15]([O:19][C:20]([N:22]1[CH2:28][CH2:27][C:26]2[C:29]([S:34][CH:35]([C:36]#[N:37])[CH2:1][CH3:2])=[C:30]([Cl:33])[CH:31]=[CH:32][C:25]=2[CH2:24][CH2:23]1)=[O:21])([CH3:18])([CH3:17])[CH3:16]

Komponenten

6

Edukt 4

HCID 6340IodoethaneHCID 8078CyclohexaneHCID 2724682Lithium diisopropylamideHCID 667072373-tert-butoxycarbonyl-7-chloro-6-(1-cyano-methylthio)-2,3,4,5-tetrahydro-1H-benzo[d]azepine

Produkt 1

HCID 66706966(+/-)-3-tert-butoxycarbonyl-7-chloro-6-(1-cyanopropylthio)-2,3,4,5-tetrahydro-1H-benzo[d]azepineAusbeute 68 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel3×

Versuchsvorschrift

To a stirred solution of 1.5M lithium diisopropylamide in cyclohexane (1.37 mL, 2.05 mmol) in dry THF (5 mL) at −78° C. under dry nitrogen, add a solution of 3-tert-butoxycarbonyl-7-chloro-6-cyanomethylthio-2,3,4,5-tetrahydro-1H-benzo[d]-azepine (600 mg, 1.70 mmol) in THF (5 mL) and continue stirring for 2 h. Rapidly transfer the above solution via cannula to a solution of ethyl iodide (13.2 g, 84.9 mmol) in THF (5 mL) and continue stirring for 1 h. Quench with aqueous saturated ammonium chloride solution, extract three times with EtOAc, dry over anhydrous Na2SO4, and concentrate in vacuo. Purify by chromatography on silica gel eluting with hexane/EtOAc (9:1) to give (±)-3-tert-butoxycarbonyl-7-chloro-6-(1-cyanopropylthio)-2,3,4,5-tetrahydro-1H-benzo[d]azepine as a pale oil (350 mg, 68%). Use a method similar to the General Procedure 1-4 to give the title compound as an off-white solid. MS (ES+) m/z: 281 (M+H)+.

Aufarbeitung

  1. stirringcontinue stirring for 1 h
  2. customQuench with aqueous saturated ammonium chloride solution
  3. extractionextract three times with EtOAc
  4. dry with materialdry over anhydrous Na2SO4
  5. concentrationconcentrate in vacuo
  6. customPurify by chromatography on silica gel eluting with hexane/EtOAc (9:1)

Quellen und Nachweise

ORD-Eintrag
ord-6f218dee2526467c9a1751327560a6e6
Quelldatensatz
uspto-grants-2011_09
Patentnummer
US08022062B2

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