Tandem Diels−Alder Cycloadditions of 2-Pyrone-5-acrylates for the Efficient Synthesis of Novel Tetracyclolactones
作者:Soo-Im Chung、Joobeom Seo、Cheon-Gyu Cho
DOI:10.1021/jo061119e
日期:2006.8.1
Readily prepared from the regioselective Pd-catalyzed coupling reactions of 3,5-dibromo-2-pyrone, 3-bromo-2-pyrone-5-carboxylates undergo tandem uninterrupted sequential Diels−Alder cycloaddition reactions with allyl vinyl ethers in a highly regio- and stereoselective fashion to provide a series of novel tetracyclolactones in good yields.
由3,5-二溴-2-吡喃酮,3-溴-2-吡喃-5-羧酸酯的区域选择性Pd催化偶合反应制备的,在高度区域内与烯丙基乙烯基醚连续不间断地进行连续的Diels-Alder环加成反应。和立体选择性的方式,以提供高收率的一系列新颖的四环内酯。