@article{oai:toyama.repo.nii.ac.jp:00015576, author = {Shioe, Kazuma and Sahara, Yusuke and Horino, Yoshikazu and Harayama, Takashi and Takeuchi, Yasuo and Abe, Hitoshi}, issue = {10}, journal = {Tetrahedron, Tetrahedron}, month = {}, note = {application/pdf, Ellagitannins possess a wide range of biological activities and remarkable structural diversity, which commonly include an axially chiral biaryl unit. This paper describes syntheses of all-methylated versions of isorugosin B and rugosin B, which are regioisomeric, ellagitannin-related compounds. The key features of these syntheses involve the construction of an axially chiral biaryl function on a sugar moiety through a Pd-catalyzed intramolecular biaryl coupling reaction, Bringmann’s atroposelective lactone opening reaction, and a two-step ester formation. This is the first synthetic approach for generating ellagitannins featuring a valoneoyl group., Article, Tetrahedron 67(10), 1960-1970.(2011)}, pages = {1960--1970}, title = {Syntheses of All-Methylated Ellagitannin, Isorugosin B and Rugosin B}, volume = {67}, year = {2011} }