A one-pot approach to ethyl 1,4,5-triaryl-1H-pyrazole-3-carboxylates via an improved claisen condensation-knorr reaction sequence

Jiaojiao Zhai, Chunhui Gu, Jianan Jiang, Shunli Zhang, Daohua Liao, Lei Wang, Dunru Zhu, Yafei Ji