Ngoc, Duc TranAlbicker, MartinSchneider, LorenzCramer, Nicolai2011-08-172011-08-172011-08-17201010.1039/c002011ghttps://infoscience.epfl.ch/handle/20.500.14299/70141A combination of an enantioselective conjugate addn./trapping sequence and a ruthenium(III)-catalyzed domino cyclization provides a concise access to benzo[d]xanthenes , e.g., I, found in several anti-influenza active sesquiterpene natural products.enantioselective prepn benzoxanthene tetracyclic core sesquiterpenecyclization ruthenium catalyst enantioselective prepn benzoxanthene tetracyclic core sesquiterpeneconjugate addn enantioselective benzoxanthene tetracyclic core sesquiterpene prepnEnantioselective assembly of the benzo[d]xanthene tetracyclic core of anti-influenza active natural productstext::journal::journal article::research article