569337-28-6Relevant academic research and scientific papers
Substrate-Controlled [5+1] Annulation of 5-Amino-1H-phenylpyrazoles with Alkenes: Divergent Synthesis of Multisubstituted 4,5-Dihydropyrazolo[1,5-a]quinazolines
Jiang, Xunyuan,Wei, Xiaoyi,Lin, Fei,Zhang, Zhixiang,Yao, Guangkai,Yang, Shuai,Zhao, Weijing,Zhao, Chen,Xu, Hanhong
, p. 3997 - 4003 (2020)
A new and efficient [5+1] annulation reaction for the first synthesis of 5,5-disubstituted 4,5-dihydropyrazolo[1,5-a]quinazolines is described. This transition-metal-free tandem cyclization was performed with 5-amino-1H-phenylpyrazole and readily availabl
