2673-16-7Relevant academic research and scientific papers
TETRACARBOXYLIC ACID DIANHYDRIDE, POLYAMIC ACID COMPOSITION AND POLYIMIDE FILM
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Paragraph 0065-0069, (2021/09/14)
The present invention provides tetracarboxylic dianhydrides. The present invention relates to a polyamic acid composition and a polyimide film. When the tetracarboxylic dianhydride is used, a transparent polyimide resin having excellent heat resistance an
Oxidative C-C Bond Cleavage for the Synthesis of Aryl Carboxylic Acids from Aryl Alkyl Ketones
Xu, Liang,Wang, Shengpeng,Chen, Bajin,Li, Meichao,Hu, Xinquan,Hu, Baoxiang,Jin, Liqun,Sun, Nan,Shen, Zhenlu
supporting information, p. 1505 - 1509 (2018/05/25)
A metal-free and one-pot two-step synthesis of aryl carboxylic acids from aryl alkyl ketones has been achieved. The reactions were performed with iodine as the catalyst, DMSO and TBHP as the oxidants. Under the optimal reaction conditions, a number of aryl alkyl ketones could be converted into their corresponding aryl carboxylic acids in good to excellent yields (up to 94%).
The 'inverse electron-demand' Diels-Alder reaction in polymer synthesis. Part 2. Some bis(1,2,4-triazines) as potential bis-diene monomers
Bruce, Michael J.,McLean, Gillian A.,Royles, Brodyck J. L.,Smith, David M.,Standring, Paul N.
, p. 1789 - 1796 (2007/10/02)
Synthetic approaches to a series of 5,5'-linked bis(1,2,4-triazines) are described: these are potential monomers in Diels-Alder polymerisation processes.Oxidation of bis(α-bromophenylacetyl) substituted aromatic compounds with dimethyl sulfoxide, or (better) oxidation of diacetyl- or bis(phenylacetyl) substituted aromatic compounds with hydrogen bromide in dimethyl sulfoxide, gives the corresponding bis(1,2-diketones) and bis(α-keto aldehydes); these are converted into 3,3'-bis(methylsulfanyl)-5,5'-arylenebis(1,2,4-triazines) by reaction with S-methylthiosemicarbazide.The methylsulfanyl groups may then be oxidised by standard methods to give the corresponding methylsulfinyl or methylsulfonyl compounds, although the oxidised products show a tendency to decompose on storage.
