Trifluoroacetic acid → Cyclopropanecarboxylic acid {2-methyl-5-[5-(3,4,5-trichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-furan-3-ylmethyl}-amide

HRID 68582Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 68582
[CH3:1][C:2]1[O:3][C:4]([C:9]2[CH2:13][C:12]([C:18]3[CH:23]=[C:22]([Cl:24])[C:21]([Cl:25])=[C:20]([Cl:26])[CH:19]=3)([C:14]([F:17])([F:16])[F:15])[O:11][N:10]=2)=[CH:5][C:6]=1[CH:7]=O.[CH:27]1([C:30]([NH2:32])=[O:31])[CH2:29][CH2:28]1.FC(F)(F)C(O)=O.C([SiH](CC)CC)C>C1(C)C=CC=CC=1>[CH3:1][C:2]1[O:3][C:4]([C:9]2[CH2:13][C:12]([C:18]3[CH:19]=[C:20]([Cl:26])[C:21]([Cl:25])=[C:22]([Cl:24])[CH:23]=3)([C:14]([F:16])([F:15])[F:17])[O:11][N:10]=2)=[CH:5][C:6]=1[CH2:7][NH:32][C:30]([CH:27]1[CH2:29][CH2:28]1)=[O:31]

Komponenten

6

Edukt 4

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 80376CyclopropanecarboxamideHCID 867066532-Methyl-5-[5-(3,4,5-trichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-furan-3-carbaldehyde

Produkt 1

HCID 86706657Cyclopropanecarboxylic acid {2-methyl-5-[5-(3,4,5-trichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-furan-3-ylmethyl}-amideAusbeute 86,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

A mixture of 2-methyl-5-[5-(3,4,5-trichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-furan-3-carbaldehyde (250 mg, Example 3, step I), cyclopropanecarboxylic acid amide (160 mg), trifluoroacetic acid (0.142 ml) and triethylsilane (0.301 ml) in toluene (4 ml) is refluxed overnight. After 23 hours the reaction mixture is concentrated in vacuo. The crude product is purified on a semi-preparative HPLC to yield cyclopropanecarboxylic acid {2-methyl-5-[5-(3,4,5-trichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-furan-3-ylmethyl}-amide (251 mg, compound 2.2 in Table 2) as a yellowish foam. MS (HPLC/MS): 495 (MH+). Retention time: 2.02 min.

Aufarbeitung

  1. temperatureis refluxed overnight
  2. concentrationAfter 23 hours the reaction mixture is concentrated in vacuo
  3. customThe crude product is purified on a semi-preparative HPLC

Quellen und Nachweise

ORD-Eintrag
ord-856336fd4dcb41e88ef6010aff5220e1
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08822466B2

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