Allenyl alkynones are efficiently transformed into fused bicyclic dienediones via
cyclocarbonylation reaction conditions. Mo (CO) 6/DMSO reaction conditions result in the …

The development of the stereoselective rhodium‐catalyzed [(3+ 2)+ 2] carbocyclization of
alkynylidenecyclopropanes (ACPs) with substituted allenes is described. This work …

Although 1-ethynyl-2-allenylbenzenes readily undergo Myers–Saito or Schmittel cyclization
under mild conditions, cyclocarbonylation of these moieties to 1H-cyclopenta [a] inden-2 …

A highly selective cascade reaction that allows the direct transformation of dienallenes to
spirocyclobutenes (spiro [3.4] octenes) as single diastereoisomers has been developed. The …

The rapid synthesis of bicyclo [mn 1] alkanone cores possessing quaternary carbon centers
adjacent to a bridged ketone represents a significant synthetic challenge. This type of …

A Lewis acid-mediated cascade annulation of o-alkoxy alkynols in the presence of ZnBr2
has been developed. The cascade cyclization proceeds through a 5-exo-dig cyclization …

A novel Lewis acid catalyzed tandem cyclization reaction of internal alkynols and vinyl
azides has been achieved to afford a series of products containing a pyran-based indeno [1 …

Described here is a practical carbocation‐initiated formal [3+ 2] or [4+ 2] cycloaddition
reaction for the diversity‐oriented syntheses of 1‐amidoindenes and 2‐amido‐4H …

A new metal-free oxidative decarbonylative [3+ 2] annulation of terminal alkynes with tertiary
alkyl aldehydes is presented, which features broad substrate scope and excellent selectivity …

An intriguing Lewis acid-catalyzed intramolecular ring-opening/cyclization reaction of
cyclopropylvinylallenes is developed. This process proceeds at ambient temperature to …