Rh(<scp>iii</scp>)-catalyzed, hydrazine-directed C–H functionalization with 1-alkynylcyclobutanols: a new strategy for 1<i>H</i>-indazoles
Lei Zhang, Junyu Chen, Xiahe Chen, Xiangyun Zheng, Jian Zhou, Tianshuo Zhong, Zhiwei Chen, Yun‐Fang Yang, Xinpeng Jiang, Yuanbin She, Chuanming Yu
Abstract
Rh(iii)-catalyzed coupling of phenylhydrazines with 1-alkynylcyclobutanols was realized through a hydrazine-directed C-H functionalization pathway. This [4+1] annulation, based on the cleavage of a Csp-Csp triple bond in alkynylcyclobutanol, provides a new pathway to prepare diverse 1H-indazoles under mild reaction conditions.
Topics & Concepts
Surface modificationHydrazine (antidepressant)CatalysisChemistryCombinatorial chemistryMedicinal chemistryOrganic chemistryBiochemistryPhysical chemistryCatalytic C–H Functionalization MethodsCyclopropane Reaction MechanismsCatalytic Cross-Coupling Reactions