作者:Roland Verhé、Norbert de Kimpe、Dirk Courtheyn、Laurent de Buyck、Niceas Schamp
DOI:10.1016/0040-4020(82)80073-2
日期:1982.1
3-acyl-2-alkyl-4,5-dihydrofurans. Similar cyclization of α-acyl-α,β-unsaturated esters initially afforded 3-alkoxycarbonyl-2-alkyl-4,5-dihydrofurans which were transformed into 2-acylbutanolides on further reaction with sulfuric acid.
用硫酸或二甲基甲酰胺-氯化氢或对甲苯磺酸处理α-酰基-α,β-不饱和酮产生3-酰基-2-烷基-4,5-二氢呋喃。类似地环化α-酰基-α,β-不饱和酯,最初得到3-烷氧基羰基-2-烷基-4,5-二氢呋喃,将其在进一步与硫酸反应后转化为2-酰基丁醇化物。