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 …

A novel and selective method for the synthesis of 8-methylenespiro [4, 5] trienes via
intramolecular electrophilic ipso-iodocyclization of N-(4-methylphenyl) propiolamides has …

A novel electrophilic ipso-cyclization involving an electrophile-exchange process has been
developed. In the presence of CuX (X= I, Br, SCN) and electrophilic fluoride reagents, a …

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 …

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 …

A novel and efficient method for the synthesis of 8-(polyfluoroalkoxy)-1-azaspiro [4.5] deca-
3, 6, 9-trien-2-ones has been demonstrated via the electrophilic ipso-halocyclization of N …

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 …

A novel visible-light-mediated ipso-carboacylation of N-(p-methoxyaryl) propiolamides with
acyl chloride has been established for the synthesis of diverse 3-acylspiro [4, 5] trienones …

Iodine -catalyzed and solvent-controlled selective electrophilic cyclization and oxidative
esterification of ortho -alkynyl aldehydes - Chemical Communications (RSC Publishing) DOI:10.1039/B927185F …

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