1-Trifluoromethyl-2-chloroethylthiolated carbonyl compounds: Synthesis and properties
摘要:
1-Trifluoromethyl-2-chloroethylsulfenyl chloride thiolates enolizible ketones, forming products of mono- and disubstitution. The properties of the resultant sulfides are determined by the presence in the molecule of two acidic CH centers. Thus, bromination proceeds at the ambident center and reaction with bases leads to (1-trifluoromethylvinyl) sulfides which are able to undergo intramolecular cyclizations and Diels-Alder reactions.
Diastereoselective Synthesis of CF<sub>3</sub>-Substituted, Epoxide-Fused Heterocycles with β-(Trifluoromethyl)vinylsulfonium Salts
作者:Sven P. Fritz、Thomas H. West、Eoghan M. McGarrigle、Varinder K. Aggarwal
DOI:10.1021/ol303200n
日期:2012.12.21
CF3-substituted vinyl diphenylsulfonium triflate is an effective annulation reagent for the formation of alpha-CF3 substituted, epoxide-fused heterocycles (pyrrolidines, piperidines, and tetrahydrofurans). This simple method affords a variety of valuable heterocyclic building blocks in a highly diastereoselective manner (dr>20:1).
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