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.
A convenient synthesis of anthranilic acids by Pd-catalyzed direct intermolecular ortho-C–H amidation of benzoic acids
作者:Ka-Ho Ng、Fo-Ning Ng、Wing-Yiu Yu
DOI:10.1039/c2cc36502b
日期:——
An efficient method for synthesis of anthranilic acids by Pd-catalyzed ortho-CâH amidation of benzoic acids is disclosed. The amidation is proposed to proceed by carboxylate-assisted ortho-CâH palladation to form an arylpalladium(II) complex, followed by nitrene insertion to the PdâC bond.