Transformations of lignans. Part 10: Acid-catalysed rearrangements of arboreol and wodeshiol and conversion of gmelanone oxime into a dihydropyranone derivative
作者:Revuru Venkateswarlu、Chakicherla Kamakshi、Pithani V. Subhash、Syed G.A. Moinuddin、Mangala P. Gowri、Robert S. Ward、Andrew Pelter、Michael B. Hursthouse、Simon J. Coles、Mark E. Light
DOI:10.1016/j.tet.2005.06.106
日期:2005.9
gmelanone 2 by a pinacol-type rearrangement of arboreol 1 supports its biogenesis and confirms its relative and absolute configuration. The further transformation of gmelanone oxime 12 into the dihydropyranone oxime 13 supports the intermediacy of gmelanone like intermediates in the rearrangements of furofuran lignans to pyran derivatives. In contrast, acid-catalysedrearrangement of wodeshiol 7 affords the