The First Formation of (1Z)-1-Alkylidene-1H-isobenzofuranium Amides and 1H-Inden-1-ones: Acid-Promoted 5-exoCyclization and Hydration/Aldol Condensation Reactions ofo-Ethynylbenzophenones

The First Formation of (1Z)-1-Alkylidene-1H-isobenzofuranium Amides and 1H-Inden-1-ones: Acid-Promoted 5-exoCyclization and Hydration/Aldol Condensation Reactions ofo-Ethynylbenzophenones