Palladium(II)-Catalyzed Ortho-Arylation of Benzylic Phosphonic Monoesters Using Potassium Aryltrifluoroborates
摘要:
The new monophosphonic acid directing group was successfully utilized in the Pd (II)-catalyzed orthoarylation of benzylic phosphonic monoesters using potassium aryltrifluoroborates. A wide range of benzylic phosphonic monoesters underwent clean ortho-arylation in high yields, and excellent functional group tolerance was also observed.
Palladium(II)-Catalyzed Ortho-Arylation of Benzylic Phosphonic Monoesters Using Potassium Aryltrifluoroborates
摘要:
The new monophosphonic acid directing group was successfully utilized in the Pd (II)-catalyzed orthoarylation of benzylic phosphonic monoesters using potassium aryltrifluoroborates. A wide range of benzylic phosphonic monoesters underwent clean ortho-arylation in high yields, and excellent functional group tolerance was also observed.
One-Pot Synthesis of 1,4-Diarylnaphthalenes via a Wittig-Horner Reaction/[4+2] Cycloaddition/Dehydrogenation Sequence
作者:Yanguang Wang、Zhengbo Chen、Wangge Shou
DOI:10.1055/s-0028-1083356
日期:2009.4
A one-pot synthesis of 1,4-diarylnaphthalenes from cinnamaldehydes, dimethyl benzylphosphonates, and benzenediazonium-2-carboxylate is described. The tandem process involves the Wittig-Hornerreaction of the cinnamaldehyde with the benzylphosphonate, [4+2] cycloaddition of the thus-formed diene with benzyne, and subsequent dehydrogenation. The procedure is general and efficient and the substrates are
Arylmethylphosphonates and phosphonic acids useful as anti-inflammatory
申请人:The Upjohn Company
公开号:US05593980A1
公开(公告)日:1997-01-14
This invention provides a new use of acids, esters, and salts of arylmethylphosphonates of Formula I, ##STR1## or a phosphonic acid of Formula II ##STR2## and derivatives as anti-inflammatory and anti-arthritic agents. Representative compounds include 4-dodecyloxybenzylphosphonic acid dimethyl ester, (2-naphthalenylmethyl)phosphonic acid dimethyl ester, and ([1,1'-biphenyl]-2-ylmethyl)phosphonic acid dimethyl ester.