Nicotinic Acid → Succinimidyl Nicotinate

HRID 260213Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 260213
[C:1]([OH:9])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[N:4][CH:3]=1.O[N:11]1[C:15](=[O:16])[CH2:14][CH2:13][C:12]1=[O:17].C1(N=C=NC2CCCCC2)CCCCC1>O1CCOCC1>[C:1]([O:9][N:11]1[C:15](=[O:16])[CH2:14][CH2:13][C:12]1=[O:17])(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[N:4][CH:3]=1

Komponenten

5

Edukt 3

HCID 938Nicotinic AcidHCID 10868DicyclohexylcarbodiimideHCID 80170N-Hydroxysuccinimide

Produkt 1

HCID 870586Succinimidyl NicotinateAusbeute 72 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 312751,4-DioxaneLösungsmittel2×

Versuchsvorschrift

Nicotinic acid (4.025 g, 0.0327 mol) and N-hydroxysuccinimide (3.763 g, 0.0327 mol) were dissolved in 130 ml of dioxane. Dicyclohexylcarbodiimide (6.75 g, 0.032 tool in 20 ml of dioxane was added. The reaction mixture was then stirred at room temperature for 3 hours. The dicyclohexylurea which precipitated was removed by filtration and the solvent was removed by rotary evaporation. The crude product was recrystallized from ethyl acetate to give light yellow crystals which were then washed with anhydrous ether. The product, obtained in 72% yield (5.2 g) and melting at 129°-131° C., has the formula: ##STR1535##

Aufarbeitung

  1. customThe dicyclohexylurea which precipitated
  2. customwas removed by filtration
  3. customthe solvent was removed by rotary evaporation
  4. customThe crude product was recrystallized from ethyl acetate
  5. customto give light yellow crystals which
  6. washwere then washed with anhydrous ether
  7. customThe product, obtained in 72% yield (5.2 g) and melting at 129°-131° C.

Quellen und Nachweise

ORD-Eintrag
ord-c76525e3de3b438688e8aeca2a8ef39b
Quelldatensatz
uspto-grants-1996_06
Patentnummer
US05525727

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