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Sodium Carbonate → tert-butyl 6-cyclohexyl-5-(2-formyl-4-methoxyphenyl)-4-(2-methoxy-2-oxoethyl)-4H-thieno[3,2-b]pyrrole-2-carboxylate

HRID 1008967
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1008967
Br[C:2]1[N:6]([CH2:7][C:8]([O:10][CH3:11])=[O:9])[C:5]2[CH:12]=[C:13]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[S:14][C:4]=2[C:3]=1[CH:22]1[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]1.[CH:28]([C:30]1[CH:35]=[C:34]([O:36][CH3:37])[CH:33]=[CH:32][C:31]=1B(O)O)=[O:29].C([O-])([O-])=O.[Na+].[Na+]>O1CCOCC1.CCOC(C)=O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH:22]1([C:3]2[C:4]3[S:14][C:13]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])=[CH:12][C:5]=3[N:6]([CH2:7][C:8]([O:10][CH3:11])=[O:9])[C:2]=2[C:31]2[CH:32]=[CH:33][C:34]([O:36][CH3:37])=[CH:35][C:30]=2[CH:28]=[O:29])[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]1
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Komponenten

7

Edukt 3

HCID 10340Sodium CarbonateHCID 27343652-Formyl-4-methoxybenzeneboronic acidHCID 67298890tert-butyl 5-bromo-6-cyclohexyl-4-(2-methoxy-2-oxoethyl)-4H-thieno[3,2-b]pyrrole-2-carboxylate

Produkt 1

HCID 86629779tert-butyl 6-cyclohexyl-5-(2-formyl-4-methoxyphenyl)-4-(2-methoxy-2-oxoethyl)-4H-thieno[3,2-b]pyrrole-2-carboxylateAusbeute 57 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418476HCID 178418476, VerbindungKatalysator
HCID 8857Ethyl AcetateLösungsmittel
HCID 312751,4-DioxaneLösungsmittel

Versuchsvorschrift

tert-Butyl 5-bromo-6-cyclohexyl-4-(2-methoxy-2-oxoethyl)-4H-thieno[3,2-b]pyrrole-2-carboxylate (1 eq., prepared as described in Example 1, Step 3) and 2-formyl-4-methoxyphenylboronic acid (1.5 eq.) were dissolved in dioxane (0.1 M) and treated with 2 M Na2CO3 solution (2 eq.). The solution was degassed by bubbling argon through it and Pd(PPh3)2Cl2 (0.1 eq.) was added. The reaction mixture was heated to reflux for 20 min. After cooling down to RT, the mixture was diluted with EtOAc and washed with 1 N hydrochloric acid and with brine. The organic layer was dried over sodium sulfate and evaporated in vacuo and the residue purified by chromatography (PE:EtOAc, 9:1) to afford the pure title compound (57%) as a solid. 1H-NMR (400 MHz, DMSO-d6, 300 K, δ) 9.64 (s, 1H), 7.89 (s, 1H), 7.43 (s, 1H), 7.41-7.38 (m, 2H), 4.92 (d, J 18.0, 1H), 4.73 (d, J 18.0, 1H), 3.90 (s, 3H), 3.50 (s, 3H), 2.14-2.09 (m, 1H), 1.73-1.19 (m, 10H), 1.54 (s, 9H). MS (ES+) m/z: 534 [M+Na]+.

Aufarbeitung

  1. customThe solution was degassed
  2. additionwas added
  3. temperatureThe reaction mixture was heated
  4. temperatureto reflux for 20 min
  5. washwashed with 1 N hydrochloric acid and with brine
  6. dry with materialThe organic layer was dried over sodium sulfate
  7. customevaporated in vacuo
  8. customthe residue purified by chromatography (PE:EtOAc, 9:1)

Quellen und Nachweise

ORD-Eintrag
ord-cb61a01262384ae982e879b7232d75ed
Quelldatensatz
uspto-grants-2011_07
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07973026B2

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