Hydrochloric Acid → HCID 58970492, Verbindung

HRID 409424Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 409424
[Li]CCCC.C(NC(C)C)(C)C.[Cl:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=1[CH:20]([O:22][C:23]1[CH:27]=[CH:26][S:25][C:24]=1[C:28]([O:30][CH3:31])=[O:29])[CH3:21].C(O[B:36]1[O:40][C:39]([CH3:42])([CH3:41])[C:38]([CH3:44])([CH3:43])[O:37]1)(C)C.Cl>C1COCC1>[Cl:13][C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=1[CH:20]([O:22][C:23]1[CH:27]=[C:26]([B:36]2[O:40][C:39]([CH3:42])([CH3:41])[C:38]([CH3:44])([CH3:43])[O:37]2)[S:25][C:24]=1[C:28]([O:30][CH3:31])=[O:29])[CH3:21]

Komponenten

7

Edukt 5

HCID 313Hydrochloric AcidHCID 7912DiisopropylamineHCID 50177412-Isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 58525266Methyl 3-(1-(2-chlorophenyl)ethoxy)thiophene-2-carboxylateHCID 178418339Butyllithium

Produkt 1

HCID 58970492HCID 58970492, VerbindungAusbeute 51,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel3×

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

2.5 M n-BuLi in hexanes (2.3 mL, 5.77 mmol, 1.5 Eq.) was added dropwise to a stirred solution of diisopropylamine (815 μL, 5.77 mmol, 1.5 Eq.) in anhydrous THF (20 mL) at −78° C. under nitrogen. The reaction was stirred at this temperature for 15 minutes then warmed to 0° C. for 30 minutes. The reaction was cooled to −78° C. and a solution of methyl 3-(1-(2-chlorophenyl)ethoxy)thiophene-2-carboxylate (1.14 g, 3.84 mmol, 1.0 Eq.) in anhydrous THF (10 mL) was added dropwise. After stirring at this temperature for 10 minutes, a solution of 2-isopropoxy-4,4,5,5-tetramethyl[1,3,2]-dioxaborolane (1.78 mL, 5.77 mmol, 1.0 Eq.) in anhydrous THF (10 mL) was added dropwise and stirred at −78° C. for 15 minutes then warmed to ambient temperature for 45 minutes. 1M HCl (30 mL) was added and the mixture extracted with EtOAc (3×40 mL). The combined organic extracts were washed with brine (30 mL), dried (MgSO4) and the solvent removed in vacuo. The residue was recrystalised from cyclohexane to give the sub-title compound as a white solid (837 mg, 1.98 mmol, 51%); 1H NMR (400 MHz, CDCl3) δ 1.38 (12H, s), 1.67 (3H, d), 3.90 (3H, s), 5.80 (1H, quint), 7.18 (1H, s), 7.21-7.7.34 (2H, m), 7.38 (1H, dd), 7.77 (1H, dd).

Aufarbeitung

  1. temperatureThe reaction was cooled to −78° C.
  2. stirringAfter stirring at this temperature for 10 minutes
  3. stirringstirred at −78° C. for 15 minutes
  4. temperaturethen warmed to ambient temperature for 45 minutes
  5. extractionthe mixture extracted with EtOAc (3×40 mL)
  6. washThe combined organic extracts were washed with brine (30 mL)
  7. dry with materialdried (MgSO4)
  8. customthe solvent removed in vacuo
  9. customThe residue was recrystalised from cyclohexane

Quellen und Nachweise

ORD-Eintrag
ord-4231387c0ac74bf9bfa8fef2202004b8
Quelldatensatz
uspto-grants-2014_06
Patentnummer
US08759389B1

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