790-41-0Relevant articles and documents
Preparation method of symmetric aromatic anhydride compound
-
Paragraph 0041-0042, (2021/08/11)
The invention discloses a preparation method of a symmetric aromatic anhydride compound, the preparation method comprises the following steps: dissolving alpha-terpilenol and pyridine in a solvent, adding an aroyl chloride solution, and reacting for 8-16 hours to obtain the symmetric aromatic anhydride compound. The alpha-terpilenol and the aroyl chloride are used as raw materials, and the method has the advantages of being easy to operate, mild in reaction condition, high in safety, simple in technological process and post-treatment, low in cost, high in yield of part of products and the like, and is very beneficial to industrialization.
Vilsmeier-Haack reagent mediated synthetic transformations with an immobilized iridium complex photoredox catalyst
Zhi, Peng,Xi, Zi-Wei,Wang, Dan-Yan,Wang, Wei,Liang, Xue-Zheng,Tao, Fei-Fei,Shen, Run-Pu,Shen, Yong-Miao
, p. 709 - 717 (2019/01/10)
An immobilized iridium complex photocatalyst Ir(ppy)2(PDVB-py) was synthesized by immobilization of the iridium complex onto the nanoporous vinylpyridine-divinylbenzene copolymer (PDVB-py). Its application for the synthesis of amides, nitriles, and anhydrides was reported via reactions under the action of the visible-light-driven in situ generated Vilsmeier-Haack reagent from CBr4 in DMF. The results showed that this heterogeneous photocatalyst has extremely high activity and excellent stability to be recycled five times.
Organocatalytic Desymmetrisation of Fittig's Lactones: Deuterium as a Reporter Tag for Hidden Racemisation
Spránitz, Péter,Soregi, Petra,Botlik, Bence Béla,Berta, Máté,Soós, Tibor
, p. 1263 - 1272 (2019/02/26)
Highly enantioselective desymmetrisation of Fittig's lactones with alcohols is promoted by bifunctional cinchona squaramides. The reactions were carried out with monodeuterated methanol to detect possible hidden racemisation of the stereogenic centre. Current evidence suggests that racemisation was not a relevant process for most substrates; partial erosion of enantioselectivity was only detected with ortho -substituted aryl derivates. The resultant glutaric acid derivatives possess a scaffold that is common in natural products and the compounds are also useful chiral building blocks for further synthetic endeavours.