Facial and practical synthesis of benzimidazole-based N-heterocyclic carbenes
摘要:
An efficient synthesis of benzimidazole-based N-heterocyclic carbenes has been developed. The key step in this synthetic methodology was a one-pot protocol for the synthesis of N,N'-diarylaryldiamines starting from aryldiamine and aryl halides. (C) 2013 Elsevier Ltd. All rights reserved.
Facial and practical synthesis of benzimidazole-based N-heterocyclic carbenes
摘要:
An efficient synthesis of benzimidazole-based N-heterocyclic carbenes has been developed. The key step in this synthetic methodology was a one-pot protocol for the synthesis of N,N'-diarylaryldiamines starting from aryldiamine and aryl halides. (C) 2013 Elsevier Ltd. All rights reserved.
Iodine-catalyzed synthesis of <i>N</i>,<i>N</i>′-diaryl-<i>o</i>-phenylenediamines from cyclohexanones and anilines using DMSO and O<sub>2</sub> as oxidants
作者:Mingteng Xiong、Zhan Gao、Xiao Liang、Pengfei Cai、Heping Zhu、Yuanjiang Pan
DOI:10.1039/c8cc05320k
日期:——
A novel I2-catalyzed cross-dehydrogenative aromatization of cyclohexanones and anilines to synthesize N,N′-diaryl-o-phenylenediamines has been unprecedentedly developed with dimethyl sulfoxide and oxygen employed as mild terminal oxidants. To prove the rationality of the two separate dehydration steps of the proposed mechanism, a resulting I2-catalyzed cross-dehydrogenative aromatization of cyclohexenones
Flame-retardant resin composition and electric wire
申请人:POLYPLASTICS CO. LTD.
公开号:EP0320159A1
公开(公告)日:1989-06-14
The invention provides a flame-retardant resin composition characterised in that it comprises (A) an aromatic polyester prepared by condensation polymerization between (a) a component substantially comprising an aromatic dicarboxylic acid or an ester-forming derivative thereof and (b) a component substantially comprising an aliphatic diol or an ester-forming derivative thereof,
(B) 0.1 to 30% by weight based on the total amount of the composition of a compound represented by the general formula (1) or (2)
wherein X represents a halogen atom; Y₁ and Y₂ each represent a group selected from hydroxyl, carboxyl, glycidyl ester and glycidyl ether groups; Z is a monovalent or divalent organic group and n is an integer of 1 or more and
(C) 0.1 to 30% by weight based on the total amount of the composition of a compound represented by the general formula (3):
L₁-M-L₂ (3)
wherein M is a divalent organic group L₁ and L₂ may be the same or different from each other and each represent a 3- to 8-membered cyclic reactive group selected from those having the general formulae (4) to (7):
in which each of R₁, R₂ and R₃ represent a divalent organic group wherein a hydrogen atom directly bonded to the ring may be substituted with an alkyl and/or aryl group.
The invention also includes electric wires coated therewith.
A polyester resin composition of improved heat-resistant flexibility comprises:
(A) a polyester copolymer prepared by the polycondensation of a component (a) mainly comprising an aromatic dicarboxylic acid or an ester-forming derivative thereof, with both a component (b) mainly comprising an aliphatic glycol, and a branch-forming component (c),
wherein the component (c) is contained in an amount of 0.001 to 1.0 mole % based on the component (a), and
(B) 0.1 to 10% by weight (based on the total amount of the composition) of a bisoxazoline compound.
Thermoplastic polyester composition having enhanced sliding properties
申请人:POLYPLASTICS CO. LTD.
公开号:EP0816431A2
公开(公告)日:1998-01-07
A thermoplastic resin composition which comprises (A) a thermoplastic polyester resin such as polybutylene terephthalate, (B) a rubber-modified styrenic resin such as an ABS resin, (C) an olefinic copolymer composed of (c-1) an olefinic polymer fragment and (c-2) a vinyl-series polymer fragment and (D) a branched ester obtainable from a C16-30 fatty acid and/or alcohol having at least one branched chain, and which may contain (E) an inorganic filler, (F) a flame-retardant, (G) an inorganic flame-retardant auxiliary and so on. This resin composition has improved friction/abrasion characteristics with maintaining its high mechanical characteristics, and is useful for providing a moulded article including a sliding member.