Combination of enzyme- and Lewis acid-catalyzed reactions: a new method for the synthesis of 6,7-dihydrobenzofuran-4(5H)-ones starting from 2,5-dimethylfuran and 1,3-cyclohexanediones
作者:Chimène Asta、Dietmar Schmidt、Jürgen Conrad、Wolfgang Frey、Uwe Beifuss
DOI:10.1039/c3ob40926k
日期:——
The Lewis acid-catalyzed domino 1,2-addition/1,4-addition/elimination between (Z)-3-hexene-2,5-dione and 1,3-dicarbonyls delivers 3-methyl-6,7-dihydrobenzofuran-4(5H)-ones exclusively with yields up to 82%. The combination of this new process with the laccase-catalyzed formation of (Z)-3-hexene-2,5-dione by oxidative cleavage of 2,5-dimethylfuran allows for the synthesis of 6,7-dihydrobenzofuran-4(5H)-ones
路易斯酸催化的多米诺骨牌之间的1,2-加成/ 1,4-加成/消除 (Z)-3-己烯-2,5-二酮1,3-二羰基化合物可专门提供3-甲基-6,7-二氢苯并呋喃-4(5 H)-一,产率最高可达82%。此新方法与漆酶催化的三聚氰胺的结合(Z)-3-己烯-2,5-二酮 通过氧化裂解 2,5-二甲基呋喃可以直接从合成开始合成6,7-二氢苯并呋喃-4(5 H)-2,5-二甲基呋喃。