ol7b03811_si_001.pdf (3.86 MB)
Synthesis of 5‑(Trifluoromethyl)pyrazolines by Formal [4 + 1]-Annulation of Fluorinated Sulfur Ylides and Azoalkenes
journal contribution
posted on 2018-02-02, 04:36 authored by Zhiyong Wang, Yanzhou Yang, Fang Gao, Qian Luo, Ling FangIn situ formed 1,2-diaza-1,3-dienes
were used in formal [4 + 1]-annulation
reactions with fluorinated sulfur ylides. This protocol provides a
novel and efficient method for the synthesis of 5-(trifluoromethyl)pyrazolines
in moderate to excellent yields.