Silver-Catalyzed Regio- and Stereoselective Addition of Carboxylic Acids to Ynol Ethers
作者:Jing Yin、Yihui Bai、Mengyi Mao、Gangguo Zhu
DOI:10.1021/jo501615a
日期:2014.10.3
enol esters in good yields with excellent regio- and stereoselectivity. Meaningfully, the Ni-catalyzed selective coupling of alkenyl C–OPiv bonds of (Z)-α-alkoxy enol esters with boronic acids enables a convenient route to the access of (E)-enol ethers. As such, the two-step procedure, consisted of a hydrocarboxylation and a subsequent Suzuki–Miyaura coupling, offers a formal trans hydroarylation of
A Pd-catalyzed addition of boronic acids to ynol ethers has been realized, delivering trisubstituted vinyl ethers in good yields with perfect control of the regio- and stereoselectivity. The reaction proceeds under mild conditions and exhibits excellent functional group compatibility. Moreover, the resultant products can be converted into pentasubstituted benzenes via the tandem Diels–Alder/aromatization reaction.