Palladium-Catalyzed Addition of Mono- and Dicarbonyl Compounds to Conjugated Dienes
作者:Andreas Leitner、Jens Larsen、Christian Steffens、John F. Hartwig
DOI:10.1021/jo0490999
日期:2004.10.1
cyanoesters, malononitrile, and α-sulfonyl esters. Reactions of these substrates with both cyclic and acyclic dienes are reported. Reactions catalyzed by complexes of nonracemic chiral ligands were also conducted, and the first enantioselective version of this reaction was achieved with a Josiphos ligand with enantioselectivities up to 81%.
已经开发了分子间,钯催化的二羰基单羰基和1,3-二羰基化合物的α-CH键加成反应,并探索了与多种羰基化合物和腈反应的范围。CpPd(烯丙基)和可商购的1,3-双(二环己基膦基)丙烷(DCyPP)的组合以高收率催化了这些底物的CH键的1:1加成成二烯。这些反应包括不寻常地将酮,内酯,酯和腈的CH键加成至二烯,以及更常见的氰基酯,丙二腈和α-磺酰基酯的加成。报道了这些底物与环状和非环状二烯的反应。还进行了由非外消旋手性配体的配合物催化的反应,