Asymmetric synthesis, stereochemistry and rearrangement reactions of naturally occurring 7′-hydroxylignano-9,9′-lactones
作者:Barbara Raffaelli、Kristiina Wähälä、Tapio Hase
DOI:10.1039/b513303c
日期:——
The asymmetric synthesis of a series of (7'S,8R,8'R)-7'-hydroxylignano-9,9'-lactones is presented, among them the mammalian lignan (7'S)-hydroxyenterolactone and (7'S)-parabenzlactone, allowing the stereochemistry of natural occurring (-)-parabenzlactone to be re-assigned. A hydroxylactone rearrangement and its possible mechanisms are discussed. Finally a brief survey of the current naming and numbering
提出了一系列(7'S,8R,8'R)-7'-hydroxylignano-9,9'-内酯的不对称合成,其中包括哺乳动物的木脂素(7'S)-羟基对映体内酯和(7'S)-对羟基苯甲酸酯。天然存在的(-)-对羟基苯甲酸酯的立体化学有待重新分配。羟基内酯重排及其可能的机制进行了讨论。最后,简要介绍了7'-羟基木质素-9,9'-内酯的当前命名和编号变体,并提出了统一术语的建议。