Thiazolium salt-catalyzed C−C triple bond cleavage for accessing substituted 1-naphthols via benzannulation

Peng Zhou, Jia-Yin Wang, Tian-Shu Zhang, Guigen Li,* Wen-Juan Hao, Shu-Jiang Tu,* and Bo Jiang*

A first thiazolium salt-catalyzed C-C triple bond cleavage of benzene-linked allene-ynes has been established. The reaction pathway involves [2 + 2] cycloaddition and ring-opening of in-situ-generated cyclobutenes with H₂O under mild and convenient conditions, and provides a practical access to substituted 1-naphtholswith potentially valuable application.

Chem. Commun. 2018, 54, 164-167