(S)-3,7-dimethyl-5-octene-1,7-diol and related oxygenated monoterpenoids from petals of Rosa damascena Mill.

(S)-3,7-dimethyl-5-octene-1,7-diol and related oxygenated monoterpenoids from petals of Rosa damascena Mill.
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DOI:
10.1021/jf970987x
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发表时间:
1998-05-01
影响因子:
6.1
通讯作者:
Winterhalter, P
Winterhalter, P
中科院分区:
农林科学1区
文献类型:
--
作者:
Knapp, H;Straubinger, M;Winterhalter, P

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从玫瑰花中获得的甲醇提取物进行XAD-8吸附层析。用多层螺旋管逆流色谱法(MLCCC)的甲醇馏分的预折射产生五个亚馏分。在pH 2.5下热处理时,从极性最小的亚馏分V中释放出主要量的玫瑰油的关键气味剂,即同分异构体玫瑰氧化物1a/B。对馏分V的进一步色谱分析首次鉴定出真正的玫瑰氧化物前体(S)-3,7-二甲基-5-辛烯-1,7-二醇(2)。除了二醇2之外,还鉴定了以下单萜二醇:3,7-二甲基-7-辛烯-1,6-二醇(3),2,6-二甲基-1,7-辛烯-3,6-二醇(4),(2 E,5E)-3,7-二甲基-2,5-辛烯-1,7-二醇(5),(2 E)-3,7-二甲基-2,7-辛烯-1,6-二醇(6),(2 Z,5E)-3,7-二甲基-2,5-辛-1,7-二醇(7)、(2 Z)-3,7-二甲基-2,7-辛-1,6-二醇(8)、(Z)-2,6-二甲基-2-辛烯-1,8-二醇(9)、(E)-2,6-二甲基-2-辛烯-1,8-二醇(10)、(2)-2,6-二甲基-2,7-辛-1,6-二醇(II)、(E)-2,6-二甲基-2,7-辛-1,6-二醇,6-二醇(12),(2 E,GE)-2,6-二甲基-2,6-辛烯-1,8-二醇(13),(2 E,6 Z)-2,6-二甲基-2,6-辛烯-1,8-二醇(14),2,6-二甲基辛烯-1,8-二醇(15),2,6-二甲基-7-辛烯-1,6-二醇(16),(E)-3,7-二甲基-2-辛烯-1,8-二醇(17),(Z)-3,7-二甲基,7-二甲基-2-辛烯-1,8-二醇(18)、3,7-二甲基辛烯-1,7-二醇(19)、2,6-二甲基-7-辛烯-2,6-二醇(20)、3,7-二甲基-6-辛烯-1,3-二醇(21)和(2 E)-3,7-二甲基-2,6-辛烯-1,4-二醇(22)。
The methanolic extract obtained from rose flowers was subjected to XAD-8 adsorption chromatography. Prefractionation of the methanolic eluate using multilayer coil countercurrent chromatography (MLCCC) yielded five subfractions. From the least polar subfraction V, a major amount of the key odorants of rose oil, that is, isomeric rose oxides 1a/b, was liberated upon heat treatment at pH 2.5. Further chromatographic workup of fraction V led, for the first time, to the identification of the genuine rose oxide precursor (S)-3,7-dimethyl-5-octene-1,7-diol (2). In addition to diol 2, the following monoterpene diols have been identified: 3,7-dimethyl-7-octene-1,6-diol (3), 2,6-dimethyl-1,7-octadiene-3,6-diol (4), (2E,5E)-3,7-dimethyl-2,5-octadiene-1,7-diol (5), (2E)-3,7-dimethyl-2,7octadiene-1,6-diol (6), (2Z,5E)-3,7-dimethyl-2,5-octadiene-1,7-diol (7), (2Z)-3,7-dimethyl-2,7-octadiene-1,6-diol (8), (Z)-2,6-dimethyl-2-octene-1,8-diol (9), (E)-2,6-dimethyl-2-octene-1,8-diol(10), (2)-2,6-dimethyl-2,7-octadiene-1 ,6-diol(ll), (E)-2,6-dimethyl-2,7-octadiene-1,6-diol (12), (2E,GE)-2,6-dimethyl-2 ,6-octadiene-1,8-diol(13), (2E,6Z)-2,6-dimethyl-2,6-octadiene-1,8-diol(14), 2,6-dimethyloctane-1,8-diol(15), 2,6-dimethyl-7-octene-1,6-diol (16), (E)-3,7-dimethyl-2-octene-1,8-diol (17), (Z)-3,7-dimethyl-2-octene-1,8-diol (18), 3,7-dimethyloctane-1,7-diol (19), 2,6-dimethyl-7-octene-2,6-diol (20), 3,7-dimethyl-6-octene-1,3-diol (21) and (2E)-3,7-dimethyl-2,6-octadiene-1,4-diol (22).