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-catalysed rearrangement of wodeshiol 7 affords the
gmelanone的合成2通过arboreol的频哪醇型重排1和支撑其的生物合成,并确认它的相对和绝对构型。葛兰酮肟12进一步转化为二氢吡喃酮肟13支持了呋喃呋喃木脂素向吡喃衍生物的重排时,中间物像中间物一样与葛兰酮类似。相反,wodeshiol 7的酸催化重排得到二氢吡喃酮8。