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Abstract: An iron‐catalyzed radical allylation of cyclobutanone oxime esters with allylic sulfones via C−C bond cleavage is reported. This protocol provides a straight‐forward approach to cyanoalkylated alkenes with good functional group tolerance and high regioselectivity. Furthermore, this reaction can be further expanded to ring‐opening of less‐strained cyclopentanone oxime esters, leading to desired cyanoalkylated alkenes in good yields. [ABSTRACT FROM AUTHOR]

A palladium-catalyzed cycloisomerisation reaction of 1,6-enyne acetic esters have been developed. This cyclization reaction shows excellent regioselectivity and good functional group tolerance to obtain five-membered nitrogenated heterocyclic conjugated trienes in moderate to excellent yields. The resulting conjugated trienes could be facilely converted to highly substituted benzenes through Diels-Alder reactions. [ABSTRACT FROM AUTHOR]

A novel copper-catalyzed one-pot functionalization of homopropargylic alcohols that involves trifluoromethylation, aryl migration, and formation of a carbonyl moiety has been developed. This reaction constitutes the first direct conversion of homopropargylic alcohols into CF3-containing 3-butenal or 3-buten-1-one derivatives in a regioselective manner. Mechanistic studies indicate that the 1,4-aryl migration proceeds through a radical pathway. [ABSTRACT FROM AUTHOR]

A facile access to 4-((trifluoromethyl)thio)-2,3-dihydrofurans from unprotected homopropargylic alcohols in high regioselectivity is reported. This method is the first example of using a free hydroxy group as a nucleophile to complete a trifluoromethylthiolation/cyclization protocol with an alkyne in moderate to excellent yields. [ABSTRACT FROM AUTHOR]

The article presents chemical equations related to the article "Copper-Catalyzed Trifluoromethylation-Cyclization of Enynes: Highly Regioselective Construction of Trifluoromethylated Carbocycles and Heterocycles" by P. Gao and others, published in the "Chemistry: A European Journal" in 2013.

The article presents a diagram of the regioselective synthesis of highly substituted 4H-cyclopenta[b]furans using platinum (IV) catalysts through cascade heterocyclization of 2-(1-alkynyl)-3-aryl-2-propenals with arylethenes.