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1-Benzoyl-2-isopropylhydrazine → benzoic acid N'-[2-(2-bromo-4-fluoro-phenoxy)-acetyl]-N'-isopropyl-hydrazide

HRID 2250886
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2250886
[Br:1][C:2]1[CH:12]=[C:11]([F:13])[CH:10]=[CH:9][C:3]=1[O:4][CH2:5][C:6]([OH:8])=O.[CH:14]([NH:17][NH:18][C:19](=[O:26])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1)([CH3:16])[CH3:15].C(N(C(C)C)CC)(C)C.F[P-](F)(F)(F)(F)F.Br[P+](N1CCCC1)(N1CCCC1)N1CCCC1>CN(C=O)C>[Br:1][C:2]1[CH:12]=[C:11]([F:13])[CH:10]=[CH:9][C:3]=1[O:4][CH2:5][C:6]([N:17]([CH:14]([CH3:16])[CH3:15])[NH:18][C:19](=[O:26])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1)=[O:8]
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Komponenten

6

Edukt 4

HCID 188691-Benzoyl-2-isopropylhydrazineHCID 81531DiisopropylethylamineHCID 3028732-(2-Bromo-4-fluorophenoxy)acetic acidHCID 2733179PyBroP

Produkt 1

HCID 58689907benzoic acid N'-[2-(2-bromo-4-fluoro-phenoxy)-acetyl]-N'-isopropyl-hydrazideAusbeute 70 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

A solution of (2-bromo-4-fluoro-phenoxy)-acetic acid (2.00 g, 8.03 mmol) and benzoic acid N′-isopropyl-hydrazide (1.72 g, 9.63 mmol) in DMF (20 mL) was treated with diisopropylethyl amine (3.5 mL, 20.07 mmol) and bromotripyrrolidinophosphonium hexafluorophosphate (PyBroP, 5.62 g, 12.04 mmol) at room temperature overnight. The reaction mixture was partitioned between 1N HCl and ethyl acetate. The organic layer was successively washed with saturated sodium bicarbonate and brine, then dried over sodium sulfate, filtered and concentrated. The crude was absorbed on silica and purified on a silica gel column with a 20-30% ethyl acetate/hexanes gradient to afford the product as a white crystalline solid (2.29 g, 70%).

Aufarbeitung

  1. customThe reaction mixture was partitioned between 1N HCl and ethyl acetate
  2. washThe organic layer was successively washed with saturated sodium bicarbonate and brine
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe crude was absorbed on silica
  7. custompurified on a silica gel column with a 20-30% ethyl acetate/hexanes gradient

Quellen und Nachweise

ORD-Eintrag
ord-547bc9c2faba4a358b17e029cab71dbc
Quelldatensatz
uspto-grants-2008_01
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07317125B2

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