An approach toward oxidopyrylium ylides using Rh(II)-catalyzed cyclization chemistry
作者:Albert Padwa、Jutatip Boonsombat、Paitoon Rashatasakhon
DOI:10.1016/j.tetlet.2007.06.118
日期:2007.8
The Rh(II)-catalyzed reaction of the E-isomer of 2-diazo-3,6-dioxo-6-phenyl-hex-enoic acid methyl ester was carried out in the presence of various carbonyl compounds and was found to give 1,3-dioxoles in moderate to good yield. In an attempt to prepare the starting -diazo substrate, an unexpected pseudo-dimerization reaction was encountered when 5-phenyl-furan-2,3-dione was heated in the presence of
2-重氮-3,6-二氧-6-苯基-己-烯酸甲酯的E-异构体的Rh(II)-催化反应在各种羰基化合物存在下进行,发现得到1 ,3-二氧杂环戊烯的产率中等至良好。在制备起始重氮底物的尝试中,当在甲醇钠存在下加热 5-苯基-呋喃-2,3-二酮时,遇到了意想不到的假二聚反应。