2(3H)-Furanone, 3-(triphenylphosphoranylidene)- → alpha-[[4,6-Bis(1,1-dimethylethyl)-5-hydroxy-2-pyrimidinyl]methylene]-gamma-butyrolactone
Reaktionsgleichung
[CH3:1][C:2]([C:5]1[C:10]([OH:11])=[C:9]([C:12]([CH3:15])([CH3:14])[CH3:13])[N:8]=[C:7]([CH:16]=O)[N:6]=1)([CH3:4])[CH3:3].C1(P(C2C=CC=CC=2)(C2C=CC=CC=2)=[C:25]2[CH2:30][CH2:29][O:28][C:26]2=[O:27])C=CC=CC=1>C1(C)C=CC=CC=1>[CH3:4][C:2]([C:5]1[C:10]([OH:11])=[C:9]([C:12]([CH3:15])([CH3:14])[CH3:13])[N:8]=[C:7]([CH:16]=[C:25]2[CH2:30][CH2:29][O:28][C:26]2=[O:27])[N:6]=1)([CH3:1])[CH3:3]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A solution of 4,6-bis(1,1-dimethylethyl)-5-hydroxypyrimidine-2-carboxaldehyde (0.5 g, 2.1 mmol) and α-triphenylphosphoranylidene-γ-butyrolactone (Katsumi, et al. Chem. Pharm. Bull. [Japan] 1986, 34, 619) (0.95 g, 2.8 mmol) in 50 mL of toluene is warmed to 60° C. overnight. The toluene is evaporated and the residue purified by flash chromatography (silica, 20% EtOAc/hexane). Recrystallization from hexane gives 0.4 g (62%) of α-[[4,6-bis(1,1-dimethylethyl)-5-hydroxy-2-pyrimidinyl]methylene]-γ-butyrolactone, mp 158°-160° C.