Copper-mediated trifluoromethylation of propiolic acids: facile synthesis of α-trifluoromethyl ketones
作者:Zhengbiao He、Rui Zhang、Mingyou Hu、Lingchun Li、Chuanfa Ni、Jinbo Hu
DOI:10.1039/c3sc51613j
日期:——
Copper-mediated decarboxylative trifluoromethylation provides a new protocol for the efficient preparation of α-trifluoromethyl ketones from propiolic acids. It was found that water is involved as a reactant in the reaction, which is significantly different from the previously reported decarboxylative fluoroalkylation reactions.
Three‐Component Coupling of α‐Trifluoromethyl Carbonyls, Azides and Amines for the Regioselective Synthesis of 1,4,5‐Trisubstituted 1,2,3‐Triazoles
作者:Ge Gao、Kuantao、Mao、Leiyang Lv、Zhiping Li
DOI:10.1002/adsc.202200094
日期:2022.4.12
A metal-free three-component coupling of α-CF3 carbonyls, azides and amines for the regioselectivesynthesis of 1,4,5-trisubstituted 1,2,3-triazoles in the air is established. Various substituted 4-amide 1,2,3-triazoles were obtained when the enolizable α-CF3 ketones were applied in aqueous reaction medium. Control and 18O-labelling experiments revealed that the in situ generated β-oxo amide was responsible
Tandem defluorination/annulation of α-CF3 carbonyls with bis-nucleophiles: Stereodivergent synthesis of 2-alkylidene-1,3-heterocycles
作者:Yangyang Ma、Kuantao Mao、Yuanjin Chen、Leiyang Lv、Zhiping Li
DOI:10.1016/j.tetlet.2022.153902
日期:2022.6
A practical protocol for the stereodivergent synthesis of 2-alkylidene-1,3-N,X-heterocycles (X = O, S, NR) from the reactions of α-CF3 carbonyls and bis-nucleophiles has been developed under metal-free and ambient conditions. The reaction proceeds via the tandem defluorination of α-CF3 carbonyls followed by sequential nucleophilic substitution with two heteroatoms of bis-nucleophiles in a stereodivergent