The preparation of 3-alkyl-2,5-dimethylfuranes via indirect alkylation of 2,5-dimethylfuran is reported. Thus, primary nitroalkanes react with cis-3-hexen-2,5-dione giving a tandem Michael addition/elimination of nitrous acid, followed by chemoselective hydrogenation of the C=C double bond of the obtained enones. The Paal-Knorr reaction, performed with p-toluenesulfonic acid in diethyl ether, completes the formation of the title compounds. In this context the nitroalkane can be considered as an alkyl cation synthon.
Synthesis of 3-Alkyl-2,5-dimethylfuran Derivatives by Indirect Alkylation of 2,5-Dimethylfuran with Aliphatic Nitrocompounds
BALLINI, Roberto;BOSICA, Giovanna;FIORINI, Dennis;
2001-01-01
Abstract
The preparation of 3-alkyl-2,5-dimethylfuranes via indirect alkylation of 2,5-dimethylfuran is reported. Thus, primary nitroalkanes react with cis-3-hexen-2,5-dione giving a tandem Michael addition/elimination of nitrous acid, followed by chemoselective hydrogenation of the C=C double bond of the obtained enones. The Paal-Knorr reaction, performed with p-toluenesulfonic acid in diethyl ether, completes the formation of the title compounds. In this context the nitroalkane can be considered as an alkyl cation synthon.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
