An article Pd(ii)-Catalyzed alkyne annulation through allylic isomerization: synthesis of spiro-cyclopentadiene pyrazolones WOS:000653779300001 published article about PHOTOPHYSICAL PROPERTIES; ACTIVATION; FUNCTIONALIZATION; MECHANISM in [Changmai, Sumi; Sultana, Sabera; Gogoi, Sanjib] North East Inst Sci & Technol, CSIR, Chem Sci & Technol Div, Appl Organ Chem, Jorhat 785006, Assam, India; [Changmai, Sumi; Sultana, Sabera; Gogoi, Sanjib] AcSIR, Ghaziabad 201002, India; [Sarma, Bipul] Tezpur Univ, Dept Chem Sci, Tezpur 784028, Assam, India in 2021, Cited 30. The Name is 3-Methyl-1-p-tolyl-5-pyrazolone. Through research, I have a further understanding and discovery of 86-92-0. Product Details of 86-92-0
The Pd(ii)-catalyzed activation of Csp(2)-H bond and double alkyne annulation which proceeds via allylic isomerization is reported for the first time. This reaction of antipyrines with alkynes provides an efficient synthetic route for the biologically important spiro-cyclopentadiene pyrazolones. In the presence of Lawesson’s reagent, this Pd(ii)-catalyzed annulation reaction affords another spiro-cyclopentadiene pyrazolone which displays very good fluorescence properties.
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Reference:
Article; Zhang, Yong; Nie, Long-Jun; Luo, Liang; Mao, Jia-Xin; Liu, Jin-Xiang; Xu, Guo-Hai; Chen, Deliang; Luo, Hai-Qing; Tetrahedron; vol. 76; 7; (2020);,
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