Triethylamine → (R)-1-[4-(4-Oxazolo[5,4-b]pyridin-2-yl-piperazin-1-yl)-pyrimidin-2-yl]-ethyl butyrate

HRID 431645Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 431645
[C:1]([O:6][C@@H:7]([C:9]1[N:14]=[C:13](Cl)[CH:12]=[CH:11][N:10]=1)[CH3:8])(=[O:5])[CH2:2][CH2:3][CH3:4].C(N(CC)CC)C.[N:23]1([C:29]2[O:30][C:31]3[C:36]([N:37]=2)=[CH:35][CH:34]=[CH:33][N:32]=3)[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1>C(O)(C)C>[C:1]([O:6][C@@H:7]([C:9]1[N:14]=[C:13]([N:26]2[CH2:25][CH2:24][N:23]([C:29]3[O:30][C:31]4[C:36]([N:37]=3)=[CH:35][CH:34]=[CH:33][N:32]=4)[CH2:28][CH2:27]2)[CH:12]=[CH:11][N:10]=1)[CH3:8])(=[O:5])[CH2:2][CH2:3][CH3:4]

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 10944226(R)-1-(4-chloro-pyrimidin-2-yl)ethyl butyrateHCID 223287892-Piperazin-1-yl[1,3]oxazolo[5,4-b]pyridine

Produkt 1

HCID 11143754(R)-1-[4-(4-Oxazolo[5,4-b]pyridin-2-yl-piperazin-1-yl)-pyrimidin-2-yl]-ethyl butyrateAusbeute 94 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3776IsopropanolLösungsmittel

Versuchsvorschrift

To a solution of (R)-1-(4-chloro-pyrimidin-2-yl)-ethyl butyrate (prepared according to the method of Preparation Seven, 6.8 g, 29.9 mmol) and triethylamine (12.5 mL, 89.6 mmol) in isopropanol (100 mL) was added 2-(1-piperazinyl)oxazolo[5,4-b]pyridine (prepared according to the method of Example 9, Step A, 6.1 g, 29.9 mmol). This mixture was stirred at reflux overnight, cooled to room temperature, and evaporated. The residue was diluted with saturated aqueous sodium bicarbonate and extracted with chloroform (3×). The combined organic extracts were dried over sodium sulfate, filtered, evaporated, and purified by flash column chromatography (1.5→2% methanol/chloroform) to give 11.1 g (94%) of the title compound of Example 9, Step B as a yellow oil which solidified upon standing. 1H NMR (CDCl3, 250 MHz) δ 8.28 (d, 1H), 7.97 (dd, 1H), 7.60 (dd, 1H), 7.25 (dd, 1H), 6.44 (d, 1H), 5.70 (q, 1H), 3.85 (app s, 8H), 2.42 (t, 2H), 1.78-1.61 (c, 2H), 1.60 (d, 3H), 0.98 (t, 3H); MS (APCI) 397 (MH+).

Aufarbeitung

  1. customprepared
  2. temperatureat reflux overnight
  3. customevaporated
  4. additionThe residue was diluted with saturated aqueous sodium bicarbonate
  5. extractionextracted with chloroform (3×)
  6. dry with materialThe combined organic extracts were dried over sodium sulfate
  7. filtrationfiltered
  8. customevaporated
  9. custompurified by flash column chromatography (1.5→2% methanol/chloroform)

Quellen und Nachweise

ORD-Eintrag
ord-3940c13a3bbb4d68b490180c5442faca
Quelldatensatz
uspto-grants-2003_12
Patentnummer
US06660740B1

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