Synthesis and Characterization of Polycarbonyl Compounds via their BF<sub>2</sub>-Adducts
作者:Laura Kersten、Stefan Roesner、Gerhard Hilt
DOI:10.1021/ol102083v
日期:2010.11.5
A cobalt-catalyzed 1,4-hydrovinylation reaction is the key step in the synthesis of 1,3-dicarbonyl and higher tri- and tetracarbonyl compounds after ozonolysis of the 1,4-diene intermediates. For the isolation and characterization of the products, the 1,3-dicarbonyl subunits were complexed with a BF2- or a BR2-fragment eliminating the keto−enol tautomerisation. Other 2,3-disubstituted 1,3-butadienes
钴催化的1,4-氢乙烯基化反应是在1,4-二烯中间体进行臭氧分解后合成1,3-二羰基和高级三羰基和四羰基化合物的关键步骤。为了分离和表征产物,将1,3-二羰基亚基与BF 2-或BR 2-片段络合,消除了酮-烯醇互变异构现象。其他2,3-二取代的1,3-丁二烯可以通过对称内部炔烃与乙烯的Grubbs烯炔复分解生成。进行氢乙烯基化和臭氧分解后,即可获得其他1,3-二酮。