6-Substituted 6H-dibenzo[b,d]pyran derivatives and process for their
申请人:Farmitalia Carlo Erba S.p.A.
公开号:US04463001A1
公开(公告)日:1984-07-31
The present invention relates to new 6-substituted 6H-dibenzo [b,d]pyran derivatives, to a process for their preparation and pharmaceutical and veterinary compositions containing them.
Palladium-Catalyzed Tandem Reactions of β-(2-Bromophenyl)-α,β-Unsaturated Carbonyl Compounds with 2-Hydroxyphenylboronic Acid: A New Route to Benzo[c]chromenes
作者:Qihua Zhu、Xuyan Wang、Yungen Xu
DOI:10.1002/ejoc.201101670
日期:2012.2
Palladium-catalyzedtandemreactions of β-(2-bromophenyl)-α,β-unsaturatedcarbonylcompounds with 2-hydroxyphenylboronicacid for the synthesis of benzo[c]chromenes are presented. This mild reaction allows formation of onecarbon–carbon bond and one carbon–oxygen bond in one pot.
2-Phenylphenols react with alkenes such as acrylate esters in the presence of a palladium-copper catalyst system under air to give the corresponding 6-substituted 6H-dibenzo[b,d]pyran derivatives.