The electrophilic cyclization of 2-(1-alkynyl)-2-alken-1-ones in the presence of various
alcohols or carbon-based nucleophiles offers an efficient and straightforward route to highly …

Five-and six-membered heterocyclic rings occur as key structural subunits in numerous
natural products, such as polyacetylenic esters,[1] phytane-type diterpenedilactones,[2] …

Spiro compounds: An iodine monochloride‐induced intramolecular cyclization of 1‐[4′‐
methoxy (1, 1′‐biphenyl) 2‐yl] alkynones has been developed (see scheme). An …

A general and efficient intramolecular electrophilic ipso-iodocyclization of para-unactivated
arylalkynes has been developed for the synthesis of spiro [4, 5] trienyl acetates. In the …

Iodocyclization reactions are acquiring an increasing importance in organic synthesis, in
view of the possibility to obtain iodine-containing heterocycles starting from readily available …

Iodine has been recognized as an efficient, non-toxic, readily available and easy-to-handle
electrophilic reagent to favour halocyclization reactions for the synthesis of novel …

A strategy for the synthesis of spiroketal compounds through a tandem iodocyclization of 1-
(2-ethynylphenyl)-4-hydroxybut-2-yn-1-one derivatives is presented. This reaction could …

A method for the preparation of 3-alkylated spiro [4.5] trienones via alkylation/ipso-
cyclization of activated alkynes with 4-alkyl-DHPs under transition-metal-free conditions is …

An efficient synthesis of highly substituted furans via the electrophilic cyclization of 1-(1-alkynyl)-cyclopropyl
ketones - ScienceDirect Skip to main contentSkip to article Elsevier logo Journals & Books …

A new, general method for the synthesis of spiro [4, 5] trienones is described by the
intramolecular ipso-halocyclization of 4-(p-unsubstituted-aryl)-1-alkynes. In the presence of …