Disclosed is a method for producing a block copolymer which comprises two or more blocks composed of aromatic units having different basic structures from each other and has a high molecular weight, a narrow chain length distribution and a narrow molecular weight distribution. Also disclosed is a block copolymer produced by the method. The method for producing a block copolymer comprises the step of sequentially reacting two or more aromatic compounds which are selected from aromatic compounds represented by a specific general formula and are different in the group Ar, in the presence of a nickel complex containing a phosphine compound represented by a specific general formula or a palladium complex containing a phosphine compound represented by a specific general formula to thereby form blocks comprising the aromatic compounds sequentially, wherein the two or more aromatic compounds are reacted in descending order of parameter of aromatic ring charge.
A high-molecular compound, characterized by containing a chain consisting of repeating units represented by the general formula (1) and having an average number of repeating units constituting the chain of 3 or above and a ratio of bonds formed between the head and the tail to all the bonds formed between repeating units of 85% or above: (1) wherein Ar
1
is a divalent aromatic group whose aromatic ring is an aromatic hydrocarbon ring; R
1
is a substituent on Ar
1
; n is an integer of 0 to 30; when n is 2 or above, plural R
1
's may be the same or different from each other, when the carbon atoms of a repeating unit of the general formula (1) are numbered as a divalent group according to Nomenclature of Organic Chemistry by IUPAC, between the two carbon atoms having free valencies, the carbon atom with a smaller number is defined as the head and the carbon atom with a larger number is defined as the tail; and no repeating unit of the general formula (1) has a two-fold axis of symmetry intersecting the straight line joining the head and the tail at right angles at the middle point.
US8349997B2
申请人:——
公开号:US8349997B2
公开(公告)日:2013-01-08
COPPER(I) IODIDE ASSISTED REACTION OF NONACTIVATED IODOARENES WITH SODIUM TRIFLUOROACETATE IN HEXAMETHYLPHOSPHORIC TRIAMIDE. NUCLEAR TRIFLUOROMETHYLATION AND DIARYL ETHER FORMATION
作者:Hitomi Suzuki、Yoshiki Yoshida、Atsuhiro Osuka
DOI:10.1246/cl.1982.135
日期:1982.1.5
Polymethyliodobenzenes react with sodium trifluoroacetate, in tine presence of copper(I) iodide, in hexamethylphosphoric triamide at 150–180°C, giving a mixture of the corresponding polymethylbenzotrifluoride, parent hydrocarbon, and bis(polymethylphenyl) ether.