A facile synthesis of 5-substituted 2-furylacetates via 6-hydroxy-3-oxo-4-hexenoates
摘要:
6-Substituted 3-ethoxy-6-hydroxy-2,4-hexadienoates (4) which were prepared by reaction of ethyl (4E)-3-ethoxy-5-formyl-2,4-pentadienoate (3a) with nucleophiles or sodium borohydride reduction of 6-substituted 3-ethoxy-6-oxo-2,4-hexadienoates (3b-e) have been converted in very good yields into 5-substituted 2-furylacetates (5) by treating with 47%HBr in THF.
6-Substituted 3-ethoxy-6-hydroxy-2,4-hexadienoates (4) which were prepared by reaction of ethyl (4E)-3-ethoxy-5-formyl-2,4-pentadienoate (3a) with nucleophiles or sodium borohydride reduction of 6-substituted 3-ethoxy-6-oxo-2,4-hexadienoates (3b-e) have been converted in very good yields into 5-substituted 2-furylacetates (5) by treating with 47%HBr in THF.
A Facile Synthesis of 5-Substituted 2-Furyl-, 2-Thienyl- and 2-Pyrrolylacetates by Cyclodehydration of g-Functionalized a,b-Unsaturated Ketones
作者:Ikuo Ueda、Tomikazu Kawano、Toru Ogawa、Saiful Md. Islam