Free radical reaction between 2-benzoyl-1,4-benzoquinones and 1,3-dicarbonyl compounds
作者:Kuang-Po Chen、Hen-Qun Lee、Yu-Chih Cheng、Che-Ping Chuang
DOI:10.1039/b907369h
日期:——
A manganese(III)-mediated reaction between 2-benzoyl-1,4-benzoquinones and 1,3-dicarbonyl compounds that produces benzo[c]furan-4,7-diones and anthracene-1,4-diones with high chemoselectivity is described. With ethyl butyrylacetate, by changing the solvent, benzo[c]furan-4,7-diones and anthracene-1,4-diones can be generated in high chemoselectivities. With ethyl benzoylacetate, N,N-dimethyl acetoacetamide and 1,3-diones, benzo[c]furan-4,7-diones were produced effectively with high selectivity. With 2-alkyl-5-benzoyl-1,4-benzoquinones, the regioselectivity of this reaction was also studied and the corresponding benzo[c]furan-4,7-dione and anthracene-1,4-dione derivatives were obtained in high regioselectivity.
本研究描述了 2-苯甲酰基-1,4-苯醌与 1,3-二羰基化合物之间以锰(III)为介质的反应,该反应能以高化学选择性生成苯并[c]呋喃-4,7-二酮和蒽-1,4-二酮。使用丁酰乙酸乙酯,通过改变溶剂,可以高化学选择性生成苯并[c]呋喃-4,7-二酮和蒽-1,4-二酮。使用苯甲酰乙酸乙酯、N,N-二甲基乙酰乙酰胺和 1,3-二酮,可以高选择性地有效生成苯并[c]呋喃-4,7-二酮。还研究了 2-烷基-5-苯甲酰基-1,4-苯醌在该反应中的区域选择性,并以高区域选择性获得了相应的苯并[c]呋喃-4,7-二酮和蒽-1,4-二酮衍生物。