作者:VERHE, R.、DE, KIMPE, N.、COURTHEYN, D.、DE, BUYCK, L.、SCHAMP, N.
DOI:——
日期:——
US6049010A
申请人:——
公开号:US6049010A
公开(公告)日:2000-04-11
Acid catalyzed ring closure reactions of electrophilic alkenes
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.