Synthesis of benzo-fused five- and six-membered heterocycles by palladium-catalyzed cyclocarbonylation
摘要:
A novel and simple synthetic methodology, based on palladium-catalyzed cyclocarbonylation reaction, is presented for preparing five- and six-membered benzo-fused heterocycles. A mechanism for the process is also proposed and discussed. (C) 2011 Elsevier Ltd. All rights reserved.
AbstractA palladium‐catalyzed intramolecular CH bond sulfuration reaction of aryl thiocarbamates has been developed. This strategy provides a new route to benzo[d][1,3]oxathiol‐2‐ones with tolerance of a wide range of substituents. Mechanistic studies suggested that the CH activation–sulfuration to afford 2‐imino‐1,3‐benzoxathiole intermediate might involve an electrophilic palladation process.magnified image
TRAXLER J. T., J. ORG. CHEM., 1979, 44, NO 26, 4971-4973