METHOD FOR RECRYSTALLIZING DIACETAL IN POLYOLEFIN RESIN
申请人:NEW JAPAN CHEMICAL CO.,LTD.
公开号:EP0953598A1
公开(公告)日:1999-11-03
The present invention relates to a method for recrystallizing diacetal, such as 1,3:2,4-bis-O-(benzylidene)-D-sorbitol or a nuclearly substituted derivative thereof, in a polyolefin resin without giving a yellowish tint to the polyolefin resin; a polyolefin resin molded article containing a recrystallized diacetal which is obtainable by said recrystallization method; a method for producing polyolefin resin pellets containing the recrystallized diacetal by utilizing said recrystallization method, and polyolefin resin pellets obtainable by the above method; and a method for producing a polyolefin resin molded article by heating and melting said pellets at a temperature not lower than its sol-gel transition temperature during the heating cycle and rapidly cooling the melt; and a polyolefin resin molded article obtainable by said method.
Synthesis of Aryl Ethers from Benzoates through Carboxylate-Directed CH-Activating Alkoxylation with Concomitant Protodecarboxylation
作者:Sukalyan Bhadra、Wojciech I. Dzik、Lukas J. Gooßen
DOI:10.1002/anie.201208755
日期:2013.3.4
copper/silver bimetallic catalyst system, aromatic carboxylate salts undergo ortho CH alkoxylation with concomitant loss of the carboxylate directing group in a protodecarboxylation step (see scheme, FG=functional group). This process provides a convenient synthetic access to the important class of aromatic ethersfrom widely available carboxylic acids.