A comparative study of side-chain-type poly(ether ether ketone) anion exchange membrane functionalized with different hetero-cycloaliphatic quaternary ammonium groups
morpholine (MMPH), respectively. The properties of these membranes were then compared with the properties of conventional quarternized poly(etherether ketone)s containing benzyltrimethylammonium (QPEEK-TMA). Model compounds, QMPY, QMPRD, QMIDZ and QMMPH, were synthesized and used to quantitatively compare the alkalinestability of hetero-cycloaliphatic quaternary ammoniumgroups using 1H NMR. The results of
ALKALI-DEVELOPABLE PHOTOSENSITIVE RESIN COMPOSITION AND BETA-DIKETONE COMPOUND
申请人:Yamada Takashi
公开号:US20100129753A1
公开(公告)日:2010-05-27
An alkali developable photosensitive resin composition contains (J) a photopolymerizable unsaturated compound having a structure resulting from the addition reaction of (B) a compound having a β-diketone moiety or a compound having a β-ketoester group to the (meth)acryloyl group of (A) a compound having at least two (meth)acryloyl groups and a hydroxyl group and subsequent esterification of the hydroxyl group of the resulting addition product with (C) a polybasic acid anhydride. The compound having a β-diketone moiety is preferably a novel β-diketone compound represented by general formula (I):
wherein R
1
is a C1-C20 alkyl group; R
2
represents R
11
, OR
11
, COR
11
, SR
11
, CONR
12
R
13
, or CN; R
11
, R
12
, and R
13
are each hydrogen, a C1-C20 alkyl group, etc.; a is 0 to 3; and b is 0 to 4.
Elemental sulfur mediated cyclization via redox strategy: Synthesis of benzothiazoles from o -chloronitrobenzenes and benzyl chlorides
作者:Xin Wang、Dazhuang Miao、Xiaotong Li、Renhe Hu、Zhao Yang、Ren Gu、Shiqing Han
DOI:10.1016/j.tet.2017.07.013
日期:2017.8
A novel metal-free synthesis of 2-substituted benzothiazoles from easily available o-chloronitrobenzenes and benzyl chlorides using elementalsulfur as traceless oxidizing agent has been developed. The protocol provides a simple, efficient, and atom-economic way to access to benzothiazoles in moderate to excellent yields. And the approach exhibited good functional group tolerance.
A biomimetic methyl transfer, analogous to a tetrahydrofolate-to-homocystein transfer, is simulated by the reaction of methylammonium salts with arylthiolatocobaloxime; the mechanism proposed is an electron transfer from the cobaloxime to the ammonium ion followed by radical substitution of the methyl group.
METHOD FOR PRODUCING MERCAPTOPHENOL COMPOUND AND INTERMEDIATE OF SAID COMPOUND
申请人:KUMIAI CHEMICAL INDUSTRY CO., LTD.
公开号:US20200277257A1
公开(公告)日:2020-09-03
A production method in which a mercaptophenol compound is obtained using an industrially preferred sulfur atom introduction reaction, and intermediate compounds of the mercaptophenol compound are provided. A method for producing a mercaptophenol compound in which a phenyl carbamate compound is produced using a phenol compound as a raw material, and then a sulfur atom is regioselectively introduced by a reaction with sulfur monochloride, and a phenyl mercaptocarbamate compound is produced as an intermediate.