innocuous reagents, such as NaClO2, NaOCl, and catalytic amounts of TEMPO, a new environmentally friendly protocol for the selective and catalytic TEMPO C(sp3)–H oxidation of piperazines and morpholines to 2,3-diketopiperazines (2,3-DKP) and 3-morpholinones (3-MPs), respectively, has been developed. This novel direct access to 2,3-DKP from piperazines provides significant advantages over the traditional
MODIFIER FOR AROMATIC POLYESTER AND AROMATIC POLYESTER RESIN COMPOSITION COMPRISING THE SAME
申请人:TABATA Masayoshi
公开号:US20110224343A1
公开(公告)日:2011-09-15
The present invention provides a modifier for aromatic polyesters which enhances the melt fluidity of aromatic polyesters without a significant decrease in the heat resistance of the aromatic polyesters, and an aromatic polyester resin composition including the modifier for aromatic polyesters. The present invention relates to a modifier for aromatic polyesters comprising polyhydric phenol residues and residues of aromatic polycarboxylic acid, acid halide or acid anhydride thereof, and the modifier comprises a material having a structure composed of a first residue selected from the group consisting of divalent residues represented by Formula (I): —Ar—W
1
x
—Ar— and by Formula (II): —Ar—, the first residues being bonded to two identical or different second residues selected from the group consisting of monovalent residues represented by Formula (III):
and monovalent residues represented by Formula (IV): —O—C(O)—R
7
—.
Synthesis and Herbicidal and Antioxidant Activity of a Series of Hetero- and Carbocyclic Derivatives of Monochloroacetic Acid
作者:E. A. Yakovenko、Yu. L. Baimurzina、G. Z. Raskil’dina、S. S. Zlotskii
DOI:10.1134/s1070427220050122
日期:2020.5
AbstractMonochloroacetic acidesters and amides containing carbo- and heterocycles and heterocyclic esters and amides derived from commercial aryloxyacetyl chlorides were synthesized. The structures of the compounds were confirmed by 1Н and 13С spectroscopy. The herbicidalactivity of the substances was studied with respect to mono- and dicotyledonous plants. The relative antioxidant activity of the compounds
Verfahren zur Spaltung von Öl-in-Wasser-Emulsionen und basische Polyamide
申请人:BAYER AG
公开号:EP0691150A1
公开(公告)日:1996-01-10
Verfahren zur Spaltung von Öl-in-Wasser-Emulsionen in eine ölarme Wasserphase und eine wasserarme Ölphase, bei denen man als Spaltmittel basische Polyamide einsetzt, die durch Umsetzung von Piperazinderivaten der allgemeinen Formel (I)
mit Aminen der allgemeinen Formel (II)
oder mit Aminen der allgemeinen Formel (III)
im Molverhältnis 0,9 : 1 bis 1,1 : 1, bei Temperaturen von 80 bis 250°C unter gleichzeitiger Entfernung von Wasser (bei R¹ = Wasserstoff) und/oder C₁-C₄-Alkoholen (bei R¹ = C₁-C₄-Alkyl) erhalten wurden, sowie so erhaltene basische Polyamide. Die verwendeten Symbole haben die in der Beschreibung angegebene Bedeutung.
The present invention provides an aromatic polyester which is substantially free from the occurrence of coloration and retains significantly high transparency even after being thermally processed at high temperature and which has high flowability. The aromatic polyester contains a polyhydric phenol residue and a residue of any one of aromatic polycarboxylic acid, halide thereof, and anhydride thereof, and terminals of the aromatic polyester have a structure represented by the formula -C(O)-R. The aromatic polyester has an end-capping rate of 90% or higher and a weight average molecular weight (Mw) ranging from 3,000 to 1,000,000.