Synthesis of Trifluoromethylated Pyrazolidines, Pyrazolines and Pyrazoles via Divergent Reaction of β-CF<sub>3</sub>-1,3-Enynes with Hydrazines
作者:Lan Wei、Shiteng Ding、Mingqing Liu、Zongxiang Yu、Yuanjing Xiao
DOI:10.1021/acs.orglett.1c02646
日期:2021.10.15
types of trifluoromethylated pyrazolidines, pyrazolines, and pyrazoles can be synthesized via divergent reaction of β-CF3-1, 3-enyne with hydrazines. The reaction with simple hydrazine monohydrate or sulfonyl hydrazines as nucleophiles produces 1,3,4-trisubstituted pyrazolines, whereas the reaction with acetyl hydrazine as nucleophiles affords 1,4,5-trisubstituted pyrazolidines. Using phenylhydrazine or
通过β-CF 3 -1, 3-烯炔与肼的发散反应可以合成三种类型的三氟甲基化吡唑烷、吡唑啉和吡唑。与简单的一水合肼或磺酰肼作为亲核试剂的反应产生 1,3,4-三取代的吡唑啉,而与作为亲核试剂的乙酰肼反应产生 1,4,5-三取代的吡唑烷。使用苯肼或叔丁基肼作为反应伙伴,产物很容易被氧化形成1,4,5-三取代的吡唑。