Methanol → (S)-2-(2-(3-bromophenyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyethanol

HRID 879284Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 879284
C([O:7][CH2:8][C@H:9]([C:15]1[C:24]([CH3:25])=[CH:23][C:18]2[N:19]=[C:20](Br)[S:21][C:17]=2[C:16]=1[C:26]1[CH:31]=[CH:30][C:29]([Cl:32])=[CH:28][CH:27]=1)[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])(=O)C(C)(C)C.[Br:33][C:34]1[CH:35]=[C:36](B(O)O)[CH:37]=[CH:38][CH:39]=1.CO.[OH-].[Na+]>O1CCOCC1>[Br:33][C:34]1[CH:35]=[C:36]([C:20]2[S:21][C:17]3[C:16]([C:26]4[CH:27]=[CH:28][C:29]([Cl:32])=[CH:30][CH:31]=4)=[C:15]([C@H:9]([O:10][C:11]([CH3:13])([CH3:12])[CH3:14])[CH2:8][OH:7])[C:24]([CH3:25])=[CH:23][C:18]=3[N:19]=2)[CH:37]=[CH:38][CH:39]=1

Komponenten

6

Edukt 4

HCID 887MethanolHCID 14798Sodium HydroxideHCID 2734318(3-Bromophenyl)boronic acidHCID 86699799(S)-2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyethyl pivalate

Produkt 1

HCID 86699802(S)-2-(2-(3-bromophenyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyethanolAusbeute 36 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

To a solution of (S)-2-(2-bromo-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-tert-butoxyethyl pivalate (310 mg, 0.577 mmol) in dioxane (5 mL), was added 3-bromophenylboronic acid (173 mg, 0.865 mmol), Ph(PPh3)4 (33 mg, 0.029 mmol) 2N K2CO3 (850 μL) in sealed tube. The reaction mixture was heated at 90° C. for 3hs. Then the reaction was cooled down and to the mixture was added MeOH (5 mL), 2N NaOH (1.5 mL) and heated at 45° C. After the reaction was finished, the reaction was washed by water, extracted by EtOAc. The organic phase was dried over MgSO4, filtered, concentrated down and purified by silica gel column, eluting by 0-50% EtOAc in hexanes to give the product (110 mg, 36%). LCMS-ESI+: calc'd for C26H25BrClNO2S: 530.0 (M+H+); Found: 530.2 (M+H+).

Aufarbeitung

  1. temperatureThen the reaction was cooled down and to the mixture
  2. temperatureheated at 45° C
  3. washthe reaction was washed by water
  4. extractionextracted by EtOAc
  5. dry with materialThe organic phase was dried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated down
  8. custompurified by silica gel column
  9. washeluting by 0-50% EtOAc in hexanes

Quellen und Nachweise

ORD-Eintrag
ord-af4ee16cc3d6404e874483577796ab0a
Quelldatensatz
uspto-grants-2015_03
Patentnummer
US08987250B2

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