The synthesis of gingerol 1 and related compounds 2-5 along with diarylheptanoids 6-8 has been accomplished using a Keck allylation, Crimmins' aldol reaction, aldehyde coupling with acetylene, and chelation controlled reductions as the key reactions. The absolute configuration of these molecules was confirmed by preparing their acetonide derivatives and by comparison of the NMR data with natural compounds. (C) 2011 Elsevier Ltd. All rights reserved.
A new method for the demetallation of tricarbonyliron diene complexes by total hydrogenation with Raney nickel. Application to a very short synthesis of (+)-[6]-gingerdiol
by treatment with freshly prepared Raney nickel. The ligands which are totally hydrogenated during the decomplexation are easily isolated in high yields, without racemization, if chiral. A very short and efficient synthesis of (+)-(3R,5S)-[6]-gingerdiol, based on this novel decomplexation procedure, which also allows the synthesis of the other diastereomers/enantiomers, is described.
Gingerdiol related compounds from the rhizomes of Zingiber officinale
作者:Hiroe Kikuzaki、Saiu-Mei Tsai、Nobuji Nakatani
DOI:10.1016/0031-9422(92)83147-q
日期:1992.5
[6]-Gingerdiol and four analogues, (3R,5S)-5-acetoxy-3-hydroxy-1-(4-hydroxy-3-methoxyphenyl)decane, (3R,5S)-3-acetoxy-5-hydroxy-1-(4-hydroxy-3-methoxyphenyl)decane,(3R,5S)-3,5-diacetoxy-1-(4-hydroxy-3-methoxyphenyl)decane and (3R,5S)-3,5-diacetoxy-1-(3,4-dimethoxyphenyl)decane, were isolated from the rhizomes of Zingiber officinale. Their structures were established by chemical and spectroscopic evidence.
The synthesis of gingerol 1 and related compounds 2-5 along with diarylheptanoids 6-8 has been accomplished using a Keck allylation, Crimmins' aldol reaction, aldehyde coupling with acetylene, and chelation controlled reductions as the key reactions. The absolute configuration of these molecules was confirmed by preparing their acetonide derivatives and by comparison of the NMR data with natural compounds. (C) 2011 Elsevier Ltd. All rights reserved.
Stereoselective Biocatalyzed Reductions of Ginger Active Components Recovered from Industrial Wastes
Ginger active constituents have been successfully recovered from industrialwaste biomasses of fermented ginger and converted into the corresponding diols and alcohols by stereoselective biocatalyzed reductions.