1-Chloro-3-iodobenzene → HCID 11625627, Verbindung

HRID 1992058Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1992058
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4](I)[CH:3]=1.[Mg].[C:10]([C:12](=[C:18]1[CH2:23][CH2:22][N:21]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[CH2:20][CH2:19]1)[C:13]([O:15][CH2:16][CH3:17])=[O:14])#[N:11]>C(OCC)C.O1CCCC1>[Cl:1][C:2]1[CH:3]=[C:4]([C:18]2([CH:12]([C:10]#[N:11])[C:13]([O:15][CH2:16][CH3:17])=[O:14])[CH2:19][CH2:20][N:21]([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[CH2:22][CH2:23]2)[CH:5]=[CH:6][CH:7]=1

Komponenten

6

Edukt 3

HCID 122691-Chloro-3-iodobenzeneHCID 5462224MagnesiumHCID 11551073TERT-BUTYL 4-(1-CYANO-2-ETHOXY-2-OXOETHYLIDENE)PIPERIDINE-1-CARBOXYLATE

Produkt 1

HCID 11625627HCID 11625627, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittel2×HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A solution of 1-chloro-3-iodobenzene (14.1 g, 59.28 mmol) in diethyl ether (12 ml) was added dropwise to a mixture of magnesium turnings (1.59 g, 65.4 mmol) in diethyl ether (50 ml) at room temperature. When the Grignard reaction was complete, the resulting organomagnesium reagent was added dropwise to a stirred mixture of compound 16a (5.0 g, 17 mmol) and cuprous iodide (800 mg, 4.2 mmol) in tetrahydrofuran (30 mL) cooled to 0° C. The reaction mixture was stirred 1 hour at 0° C. and then quenched with saturated ammonium chloride solution. Ethyl acetate (500 ml) was added and the mixture was washed successively with saturated ammonium chloride, water and brine. The organic layer was dried and concentrated and the resulting crude material was purified by column chromatography on silica gel eluting with 4:1 hexane:ethyl acetate. This afforded tert-butyl 4-(3-chlorophenyl)-4-(1-cyano-2-ethoxy-2-oxoethyl)piperidine-1-carboxylate (16b) as an oil (5.2 g, 75%). 1H NMR (400 MHz, CDCl3): δ 7.37-7.26 (m, 4H), 3.99 (br.q, 2H, J=6 Hz), 3.91 (br m, 2H), 3.58 (s, 1H), 2.88 (br.m, 2H), 2.52 (ddd, 2H, J=6, 4, 3 Hz), 2.04 (m, 2H), 1.43 (s, 9H), and 1.06 (t, 3H, J=6 Hz). ES-LCMS m/z 429 (M+Na+).

Aufarbeitung

  1. customWhen the Grignard reaction
  2. customquenched with saturated ammonium chloride solution
  3. additionEthyl acetate (500 ml) was added
  4. washthe mixture was washed successively with saturated ammonium chloride, water and brine
  5. customThe organic layer was dried
  6. concentrationconcentrated
  7. customthe resulting crude material was purified by column chromatography on silica gel eluting with 4:1 hexane

Quellen und Nachweise

ORD-Eintrag
ord-a9db1065d16b4a3a96385251f5845082
Quelldatensatz
uspto-grants-2010_01
Patentnummer
US07645771B2

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