Pyrazole is an organic compound with the formula C3H3N2H. It is a heterocycle characterized by a 5-membered ring of three carbon atoms and two adjacent nitrogen atoms, which are in ortho-substitution. 37622-90-5, formula is C6H8N2O2, Name is Ethyl 4-pyrazolecarboxylate. Pyrazoles are a class of compounds that have the ring C3N2 with adjacent nitrogen atoms.Notable drugs containing a pyrazole ring are celecoxib (celebrex) and the anabolic steroid stanozolol. Name: Ethyl 4-pyrazolecarboxylate.
Zhang, Xiaoxiang;Yu, Wenhua;Nie, Yiyu;Zhang, Yingying;Gu, Xiaoting;Wei, Wanxing;Zhang, Zhuan;Liang, Taoyuan research published 《 Copper-iodine co-catalyzed C-H aminoalkenylation of indoles via temperature-controlled selectivity switch: facile synthesis of 2-azolyl-3-alkenylindoles》, the research content is summarized as follows. An efficient copper-iodine co-catalyzed 2,3-difunctionalization of indoles with azoles and phenols via temperature-controlled selectivity switch has been developed for the green synthesis of 2-azolyl-3-alkenylindoles. The strategy involves the simultaneous establishment of C-C and C-N bonds in one single operation and provides straightforward access to a wide range of functionalized indoles with high regio-selectivity and good functional group compatibility. The utility of the new protocol was demonstrated by the concise synthesis of the analog of a potent anticancer agent. This work paves the way for further innovative direct difunctionalization of carbon-carbon double bonds.
37622-90-5, Ethyl 4-pyrazolecarboxylate, also known as Ethyl pyrazole-4-carboxylate, is a useful research compound. Its molecular formula is C6H8N2O2 and its molecular weight is 140.14 g/mol. The purity is usually 95%.
Ethyl pyrazole-4-carboxylate is a low yield, transition metal salt that is used in the synthesis of pyrazoles. It can be synthesized by the reaction of sodium ethoxide with ethyl chloroformate and a Grignard reagent. Sodium ethoxide is added to a suspension of sodium chloride and dried ethyl chloroformate, followed by addition of magnesium turnings. The mixture is refluxed for one hour, cooled, and filtered to give crystals. Ethyl pyrazole-4-carboxylate is used in the preparation of ethyl esters from aliphatic alcohols by reacting with boron trichloride or phosphorus pentachloride. It participates in certain chemical reactions as a byproduct and can damage equipment during chemical reactions. The yield of this compound can be increased by using an excess amount of Grignard reagent or adding hexamethylenetetramine to the reaction mixture, Name: Ethyl 4-pyrazolecarboxylate
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics