Efficient Synthesis of Five- and Seven-Membered-Ring Heterocycles by Rhodium(II)-Catalyzed [3+2] and [3+4] Cycloaddition of Diazodicarbonyl Compounds with Conjugated Dienes
2,2-Dibromo-1,3-diketones reacted with copper powder and olefin to give 4,5-dihydrofuran derivatives in a highly regioselective fashion.
2,2-二溴-1,3-二酮与铜粉和烯烃反应,以高度区域选择性的方式生成4,5-二氢呋喃衍生物。
Cycloaddition Reactions of Iodonium Ylides of Cyclic <i>β</i>-Diketones with 1,3-Dienes: Evidence for a Stepwise Mechanism
作者:Ioannis Alexiou、Efstathios P. Gogonas、Lazaros P. Hadjiarapoglou
DOI:10.1055/s-1999-2970
日期:1999.12
The irradiation of a cyclic β-dicarbonyl iodonium ylide with 1,3-diene in acetonitrile gives substituted dihydrofurans in moderate to high yields, presumably via a stepwise mechanism.