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
Thioether-functionalized trifluoromethyl-alkynes, 1,3-dienes and allenes: divergent synthesis from reaction of 2-trifluoromethyl-1,3-conjugated enynes with sulfur nucleophiles
A divergent synthesis of thioether-functionalized trifluoromethyl-alkynes, 1,3-dienes and allenes via regioselective nucleophilic addition of sulfur nucleophiles to 2-trifluoromethyl-1,3-conjugated enynes was developed. The addition patterns depend on the type of enyne, sulfur nucleophile and reaction conditions used. 1,4-Addition leading to thioether-functionalized trifluoromethyl-allenes was realized
Silver-catalysed tandem hydroamination and cyclization of 2-trifluoromethyl-1,3-enynes with primary amines: modular entry to 4-trifluoromethyl-3-pyrrolines
A highly efficient AgNO3-catalyzed tandem intermolecular hydroamination and cyclization reaction of 2-trifluoromethyl-1,3-enynes with primary amines leading to 4-trifluoromethyl-3-pyrrolines under mild conditions was developed.
Silver-Catalyzed Double Hydrocarbonation of 2-Trifluoromethyl-1,3-Conjugated Enynes with 1,3-Dicarbonyl Compounds: Synthesis of Ring-Trifluoromethylated Cyclopentene
intramolecular hydrocarbonation (double hydrocarbonation sequence) of 2‐trifluoromethyl‐1,3‐conjugated enynes with 1,3‐dicarbonyl compounds leading to ring‐trifluoromethylated cyclo‐pentene frameworks by combination use of AgNO3 as a catalyst and Et3N as a base was developed. Enynes possessing electron‐withdrawing aryl groups on the alkyne moiety are general good candidates for present transformation.