Diisopropylethylamine → methyl (N-tert-butoxycarbonyl-6-aminohexanoyl)aminomethylsalicylate

HRID 356744Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 356744
Cl.NC[C:4]1[CH:5]=[C:6]([OH:14])[C:7](=[CH:12][CH:13]=1)[C:8]([O:10][CH3:11])=[O:9].[CH:15]([N:18](CC)C(C)C)(C)C.C1(=O)N(O[C:30](=[O:44])[CH2:31][CH2:32][CH2:33][CH2:34][CH2:35][NH:36][C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])C(=O)CC1>CN(C)C=O>[C:40]([O:39][C:37]([NH:36][CH2:35][CH2:34][CH2:33][CH2:32][CH2:31][C:30]([NH:18][CH2:15][O:14][C:6]1[C:7](=[CH:12][CH:13]=[CH:4][CH:5]=1)[C:8]([O:10][CH3:11])=[O:9])=[O:44])=[O:38])([CH3:41])([CH3:42])[CH3:43]

Komponenten

5

Edukt 3

HCID 81531DiisopropylethylamineHCID 5074016Boc-6-Ahx-OSuHCID 22556073Methyl 4-aminomethylsalicylate hydrochloride

Produkt 1

HCID 53657009methyl (N-tert-butoxycarbonyl-6-aminohexanoyl)aminomethylsalicylateAusbeute 80 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Methyl 4-aminomethylsalicylate hydrochloride (2.25 g, 10.3 mmoles) was suspended in anhydrous N,N-dimethylformamide (30 mL), and N,N-diisopropylethylamine (3.6 mL, 20.7 mmoles) was added, followed by N-tert-butoxycarbonyl-6-aminohexanoic acid succinimidyl ester (3.38 g, 10.3 mmoles). The mixture was stirred under dry nitrogen for 18 hours, during which time all solids dissolved. The solvent was then evaporated to leave a light brown syrup, which was partitioned between ethyl acetate (100 mL) and 1M aqueous hydrochloric acid (100 mL). The layers were separated, and the ethyl acetate solution was washed with saturated aqueous sodium bicarbonate (100 mL) and saturated aqueous sodium chloride (100 mL). The ethyl acetate solution was dried over anhydrous sodium sulfate, filtered, and evaporated to an amorphous off-white solid. The solid was crystallized form ethyl acetate/hexanes, filtered, and dried in vacuo to afford 3.25 g (80% yield) of methyl (N-tert-butoxycarbonyl-6-aminohexanoyl)aminomethylsalicylate (m.p. 120°-121° C., open capillary, uncorrected).

Aufarbeitung

  1. dissolutiondissolved
  2. customThe solvent was then evaporated
  3. customto leave a light brown syrup, which
  4. customwas partitioned between ethyl acetate (100 mL) and 1M aqueous hydrochloric acid (100 mL)
  5. customThe layers were separated
  6. washthe ethyl acetate solution was washed with saturated aqueous sodium bicarbonate (100 mL) and saturated aqueous sodium chloride (100 mL)
  7. dry with materialThe ethyl acetate solution was dried over anhydrous sodium sulfate
  8. filtrationfiltered
  9. customevaporated to an amorphous off-white solid
  10. customThe solid was crystallized form ethyl acetate/hexanes
  11. filtrationfiltered
  12. customdried in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-078a18810b464b1c9ee93b3ca9673f12
Quelldatensatz
uspto-grants-1998_11
Patentnummer
US05837878

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