A novel and short synthesis of (1,4/2)-cyclohex-5-ene-triol and its conversion to (±)-proto-quercitol
作者:M.Serdar Gültekin、Emine Salamci、Metin Balci
DOI:10.1016/s0008-6215(03)00256-8
日期:2003.7
(1,4/2)-Cyclohex-5-ene-triol was synthesized starting from cyclohexa-1,4-diene with two different approaches. Photooxygenation of cyclohexa-1,4-diene and epoxy-cyclohexene afforded anti-2,3-dioxabicyclo[2.2.2]oct-7-en-5-yl hydroperoxide and anti-7-oxabicclo[4.1.0]hept-4-en-3-yl hydroperoxide, respectively. Hydroperoxy endoperoxide was reduced with aqueous sodium bisulfite; hydroperoxy-epoxide with dimethylsulfide-titanium tetraisopropoxide to give 7-oxabicyclo[4.1.0]hept-4-en-3-ol. Acidic hydrolysis of the epoxy-alcohol gave the (1,4/2)-cyclohex-3-ene-triol. Oxidation of the double bond with KMnO4 resulted in the formation of proto-quercitol. (C) 2003 Elsevier Ltd. All rights reserved.
从环己-1,4-二烯出发,通过两种不同的方法合成了(1,4/2)-环己-5-烯三醇。环己-1,4-二烯和环氧环己烯的光氧反应分别生成了反式2,3-二氧双环[2.2.2]辛-7-烯-5-基过氧化氢和反式7-氧双环[4.1.0]庚-4-烯-3-基过氧化氢。水合亚硫酸钠将羟基过氧内过氧化物还原;二甲基亚砜-四异丙氧基钛将羟基过氧环氧物还原,得到7-氧双环[4.1.0]庚-4-烯-3-醇。环氧醇的酸性水解生成了(1,4/2)-环己-3-烯三醇。高锰酸钾氧化双键,生成了果糖苷二醇。©2003 Elsevier Ltd. 保留所有权利。