Potassium Carbonate → Tert-butyl ((5-(4-((3-fluorobenzyl)oxy)phenyl)-1,3,4-thiadiazol-2-yl)methyl)carbamate

HRID 445399Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 445399
[C:1]([O:5][C:6](=[O:21])[NH:7][CH2:8][C:9]1[S:10][C:11]([C:14]2[CH:19]=[CH:18][C:17]([OH:20])=[CH:16][CH:15]=2)=[N:12][N:13]=1)([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[K+].[K+].[F:28][C:29]1[CH:30]=[C:31]([CH:34]=[CH:35][CH:36]=1)[CH2:32]Br>CN(C)C=O>[C:1]([O:5][C:6](=[O:21])[NH:7][CH2:8][C:9]1[S:10][C:11]([C:14]2[CH:15]=[CH:16][C:17]([O:20][CH2:32][C:31]3[CH:34]=[CH:35][CH:36]=[C:29]([F:28])[CH:30]=3)=[CH:18][CH:19]=2)=[N:12][N:13]=1)([CH3:4])([CH3:2])[CH3:3]

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 680073-Fluorobenzyl bromideHCID 136340687Tert-butyl ((5-(4-hydroxyphenyl)-1,3,4-thiadiazol-2-yl)methyl)carbamate

Produkt 1

HCID 86663647Tert-butyl ((5-(4-((3-fluorobenzyl)oxy)phenyl)-1,3,4-thiadiazol-2-yl)methyl)carbamate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

A solution of 4-(5-(aminomethyl)-1,3,4-thiadiazol-2-yl)phenol (1 g, 3.5 mmol) in methanol (9 mL) containing NaHCO3 (1.2 g, 13.9 mmol) and di-t-butyldicarbonate (Boc2O; 1.5 g, 7.0 mmol) was stirred for 5 h. The resulting mixture was filtered and the filtrate concentrated. The residue was dissolved in CH2Cl2 (48 mL) and treated with 0.5 M NaOCH3 in methanol (8.3 mL). After stirring at room temperature for 1 h, the volatiles were removed under vacuum to yield tert-butyl ((5-(4-hydroxyphenyl)-1,3,4-thiadiazol-2-yl)methyl)carbamate. To a solution of tert-butyl((5-(4-hydroxyphenyl)-1,3,4-thiadiazol-2-yl)methyl)carbamate (1.01 g, 2.89 mmol), dimethylformamide (16 mL) and potassium carbonate (1.36 g, 9.86 mmol) was added 3-fluorobenzylbromide (0.61 mL, 4.93 mmol), and the mixture was stirred at room temperature overnight. After 24 h, the resulting mixture was filtered and the filtrate was concentrated. The residue was purified by chromatography (silica gel, heptane:EtOAc) to yield tert-butyl((5-(4-((3-fluorobenzyl)oxy)phenyl)-1,3,4-thiadiazol-2-yl)methyl)carbamate. 1H NMR (400 MHz, CDCl3) δ 7.87-7.92 (m, 2H), 7.33-7.42 (m, 1H), 7.14-7.23 (m, 2H), 7.01-7.08 (m, 3H), 5.13 (s, 2H), 4.68-4.77 (m, 2H), and 1.48 (s, 9H); MS (ES+) 416 (M+1).

Aufarbeitung

  1. waitAfter 24 h
  2. filtrationthe resulting mixture was filtered
  3. concentrationthe filtrate was concentrated
  4. customThe residue was purified by chromatography (silica gel, heptane:EtOAc)

Quellen und Nachweise

ORD-Eintrag
ord-6e64e49caced4f94b996330ea8322111
Quelldatensatz
uspto-grants-2013_07
Patentnummer
US08476302B2

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