5634-73-1Relevant academic research and scientific papers
Silver(I)-Catalyzed Tandem Sigamatropic Rearrangement/1,3-H Shift/6π Aza-electrocyclization of N-Propargylic Hydrazones: A Mild Synthetic Route to 1,6-Dihydropyridazines
Ding, Zong-Cang,Ju, Lu-Chuan,Yang, Ying,An, Xiao-Ming,Zhou, Yun-Bing,Li, Ren-Hao,Tang, Hai-Tao,Ding, Cheng-Ke,Zhan, Zhuang-Ping
, p. 3936 - 3941 (2016/05/24)
A highly efficient AgOTf catalyzed [3,3] sigmatropic rearrangement/1,3-H shift/6' aza-electrocyclization cascade reaction of N-propargylic hydrazones has been developed. This method provides a new mild synthetic route to various polysubstituted 1,6-dihydr
Palladium and Copper Cocatalyzed Intermolecular Cyclization Reaction: Synthesis of 5-Aminopyrazole Derivatives
Ma, Chaowei,Wen, Ping,Li, Jihui,Han, Xu,Wu, Zhaoyang,Huang, Guosheng
supporting information, p. 1073 - 1077 (2016/04/09)
A novel and efficient palladium and copper co-catalyzed intermolecular cyclization of acetonitriles with hydrazones has been developed for the synthesis of 5-aminopyrazoles through C-C and C-N bond formation. The reaction has the advantages of easily avai
Vinylogous reactivity of enol diazoacetates with donor-acceptor substituted hydrazones. Synthesis of substituted pyrazole derivatives
Xu, Xinfang,Zavalij, Peter Y.,Hu, Wenhao,Doyle, Michael P.
, p. 1583 - 1588 (2013/03/28)
A regiospecific synthesis of multifunctional pyrazoleshas been developed from a cascade process triggered by Rh(II)-catalyzed dinitrogen extrusion from enol diazoacetates with vinylogous nucleophilic addition followed by Lewis acid catalyzed cyclization a
Pyrolysis of 3-hydroxy-2-arylhydrazonoalkanoic acid derivatives
Al-Awadi, Nouria A.,Ibrahim, Yehia A.,John, Elizabeth,Parveen, Aneesha
, p. 1298 - 1307 (2011/04/15)
1,2-Diaza-1,3-butadienes have been obtained from readily available 3-hydroxy-2-arylhydrazonopropanoates under various reaction conditions including pyrolysis, dehydration under Mitsunobu conditions or with acetic anhydride or acetic acid. According to their method of synthesis these 1,2-diaza-1,3- butadienes underwent subsequent reactions to give interesting products, and in the presence of proper dienophiles gave the corresponding cycloaddition products. Also, a new approach to pyrazole-3-carboxylic acid derivatives was discovered during an attempt to dehydrate 3-hydroxy-2-arylhydrazonobutanoic esters.
