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 multifilament, a monofilament, a non-woven or a tape, each having 1 to 2000 Denier per filament and a draw ratio of 1:2 to 1:11 and each made of a composition containing the components (A) a polyolefin, (B) for example a compound of the formula (B-1-a-1), (C) for example a compound of the formula (C-1-b-1), wherein b, is a number from 2 to 20, and optionally (D) one or more inorganic and/or organic pigments.