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Chemical constituents from the leaves of Alchornea trewioides(Ⅲ). Quinic acids

红背山麻杆叶的化学成分研究(Ⅲ)—奎宁酸类化合物(英文)



全 文 :书广 西 植 物 Guihaia Feb.2015,35(1):105-108           http://journal.gxzw.gxib.cn 
DOI:10.11931/guihaia.gxzw201311013
黄永林,陈月圆,刘金磊,等.红背山麻杆叶的化学成分研究(Ⅲ)—奎宁酸类化合物[J].广西植物,2015,35(1):105-108
Huang YL,Chen YY,Liu JL,et al.Chemical constituents from the leaves of Alchornea trewioides(Ⅲ).Quinic acids[J].Guihaia,2015,35(1):105-108
Chemical constituents from the leaves of
Alchornea trewioides(Ⅲ).Quinic acids
HUANG Yong-Lin,CHEN Yue-Yuan,LIU Jin-Lei,
YANG Zi-Ming,WANG Lei,LI Dian-Peng*
(Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization,Guangxi Institute of Botany,Guilin 541006,China)
Abstract:Alchornea trewioides is a kind of Traditional Chinese Medicine,which was used to treat prostate gland,shi-
gela,lumbocrural pain,inflammation and other diseases in China,and its chemical constituents and antioxidation ac-
tivity have been reported.To continue invested the chemical composition and master the material basis of A.
trewioides,80%acetone extracts of the fresh leaves of A.trewioides was successively separated by Sephadex LH-
20,MCI gel CHP 20P,and Toyopearl Butyl-650Ccolumn chromatography to yield five quinic acids.Their structures
were elucidated spectroscopic analyses as:3-O-caffeoylquinic acid(1),4-O-caffeoylquinic acid(2),5-O-caffeoylquinic
acid(3),4-O-galoylquinic acid(4),and 5-O-galoylquinic acid(5).Compounds 1-5 were isolated from the Alchornea
for the first time.Oxygen radical absorbance capacity(ORAC)of the al compounds were also compared and com-
pounds 1-5 were observed to show the strongest antioxidation activity.
Key words:Alchornea trewioides;chemical constituents;extraction and separation;quinic acid;antioxidation activity
CLC number:Q946.8  Document code:A  Article ID:1000-3142(2015)01-0105-04
红背山麻杆叶的化学成分研究(Ⅲ)—奎宁酸类化合物
黄永林,陈月圆,刘金磊,杨子明,王 磊,李典鹏*
(广西植物功能物质研究与利用重点实验室,广西植物研究所,广西 桂林541006)
摘 要:红背山麻杆作为一种常用的传统中药材,它常常被用来治疗前列腺、腰腿痛、炎症等疾病,它的化学成
分及抗氧化活性已有研究报道。为了继续研究红背山麻杆的化学成分,以掌握其物质基础,对新鲜叶子80%丙
酮提取物水萃取部位,利用凝胶、MCI及Toyopearl Butyl-650C柱色谱进行分离、纯化得到5个奎宁酸类化合物。
根据化合物的波谱数据分析鉴定为3-O-咖啡酰基奎宁酸(1)、4-O-咖啡酰基奎宁酸(2)、5-O-咖啡酰基奎宁酸
(3)、4-O-galoylquinic acid(4)、5-O-galoylquinic acid(5)。化合物1~5均为首次从本属植物中分离得到。通过抗
氧化能力指数检测(ORAC法),所有的化合物均表现出较强的抗氧化活性。
关键词:红背山麻杆;化学成分;提取与分离;奎宁酸;抗氧化活性
  Alchornea trewioides belongs to the family of Al-
chornea,and there are about 70species of distributed
around the world,including over 6species in China
(Editorial Committee in Flora of China,1996).Many
收稿日期:2014-03-12  修回日期:2014-10-11
基金项目:广西自然科学基金(2011GXNSFD018038);广西科技合作与交流计划项目(桂科合1298014-10);广西植物研究所基本业务费项目(桂植
业:13002);广西植物功能物质研究与利用重点实验室开放基金(ZRJJ2013-7)。
作者简介:黄永林(1974-),男,广西桂林人,博士,研究员,主要从事天然产物物质基础、生物活性及开发利用研究,(E-mail)hyl@gxib.cn。
*通讯作者:李典鹏,博士,研究员,从事中药、天然药物和植物化学研究,(E-mail)ldp@gxib.cn。
species of the Alchornea have been used to treat pros-
tate gland,shigela,lumbocrural pain,inflammation and
other diseases in Traditional Chinese Medicine.In our
previous studies,phenylethanoid glycosides,flavonoid
glycosides,and phenolic acids from the A.trewioides
have been reported,and the antioxidant activity was
comparated,too(Lu,2012;Qin,2012;Lu,2011;
Huang,2014).To continue to invested the chemical
composition of A.trewioides,five quinic acids were i-
solated and identified from 80%acetone extracts of the
fresh leaves of A.trewioides.Al these quinic acids(1-
5)were isolated from the Alchorneafor the first time.
Al compounds were observed to show the stronger an-
tioxidation activity.
1 Materials and Methods
Both 1 H-and 13C-NMR spectra were determined
using acetone-d6at on Bruker Avance 500spectrome-
ter(500MHz for 1 H and 125MHz for 13C)(Bruker
Biospin AG,Faelanden,Switzerland)or a JEOL JNM-
AL 400spectrometer(400MHz for 1 H and 100MHz
for 13C)(JEOL Ltd.,Tokyo,Japan)machine.Coupling
constants are expressed in Hz and chemical shifts are
given on aδ(ppm)scale with TMS as an internal
standard.MCI gel CHP 20P(75-150μm;Mitsubishi
Chemical,Tokyo,Japan),Sephadex LH-20(25-100
μm;GE Healthcare Bio-Science AB,Uppsala,Swe-
den),Chromatorex ODS(100-200mesh,Fuji Silysia
Chemical Ltd.,kasugai,Japan),and Toyopearl Butyl-
650C(TOSOH Co.,Tokyo,Japan)were used for col-
umn chromatography.The precoated Kieselgel 60F254
plates(0.2 mm thick;Merck,Darmstadt,Germany)
with toluene-ethyl formate-formic acid(1∶7∶1,v/v)
as the solvent,and spots were detected by UV ilumi-
nation(254nm)and by spraying with 2%ethanolic
FeCl3for TLC.
The fresh leaves of A.trewioides were colected
from Guangxi Institute of Botany,Guangxi,People's
Republic of China,in August 2011,and identified by
Prof.Wei Fa’nan.The voucher specimen(2011 0920)
had been deposited in the Guangxi key laboratory of
functional phytochemicals research and utilization,
Guangxi Institute of Botany.
2 Extraction and Separation
The fresh leaves of A.trewioides(5.35kg)were
cut into smal pieces and extracted with 80%acetone
(v/v)at room temperature.After filtration,the plant
debris remaining was extracted with the same manner
for further two times.The filtrate was combined,con-
centrated under reduced pressure,and removed chloro-
phyls and waxes by filtration.The extract(610g)was
partitioned into Et2O and water-soluble fractions.The
water-soluble fraction was separated by Sephadex LH-
20column chromatography(10cm i.d.×40cm)with 0
-100% MeOH(10%stepwise elution,each 2L)and
60%acetone,to aford 9fractions(Fr.1-9).Fraction 2
(14.9g)was purified on a column of MCI gel CHP
20P(6cm i.d.×40cm)with 0-100% MeOH (10%
stepwise elution,each 0.5L)to give fr.2-1(3.21g),fr.
2-2(4.58g),and fr.2-3(6.02g).Fraction 2-2was fur-
ther purified on a column of Chromatorex ODS(5cm
i.d.×40cm)with 0-100% MeOH containing 0.1%
TFA(10%stepwise elution,each 300mL)to give 1(9
mg),2(46mg),and4(12mg).Fraction3(6.51g)was
further purified on a column of MCI gel CHP 20P(4
cm i.d.×40cm)with 0-100% MeOH(20%stepwise
elution,each 500ml),Toyopearl Butyl-650C(4cm i.d.
×40cm)with 0-100% MeOH(10%stepwise elu-
tion,each 50mL),and Sephadex LH-20(4cm i.d.×40
cm)with 0-100% MeOH(10%stepwise elution,each
200mL)to aford 3(26mg)and 5(18mg).
Fig.1 Chemical structures of compounds 1-5
601 广 西 植 物                  35卷
3 Results and Analysis
3-O-Caffeoylquinic acid(1)  White amor-
phous powder,C16H18O9.1 H-NMR(500 MHz,
CD3OD)δ:2.00(1H,dd,J=8.5,13.1Hz,H-2ax),
2.17-2.25(3H,m,H-2eq,6ax,6eq),3.69(1H,dd,
J=3.1,8.5Hz,H-4),4.21(1H,ddd,J=3.1,8.5,
8.5Hz,H-5),5.39(1H,ddd,J=3.1,3.1,5.2Hz,
H-3),6.32(1H,d,J=16.0Hz,H-8′),6.80(1H,d,
J=8.5Hz,H-5′),6.94(1H,dd,J=2.0,8.5Hz,H-
6′),7.07(1H,d,J=2.0Hz,H-2′),7.60(1H,d,J=
16.0Hz,H-7′);13 C-NMR(125MHz,CD3OD)δ:
37.6(C-2),41.5(C-6),68.1(C-5),72.9(C-3),74.8
(C-4),75.4(C-1),115.1(C-2′),115.7(C-8′),116.5
(C-5′),122.9(C-6′),127.9(C-1′),146.5(C-3′),
146.8(C-7′),149.2(C-4′),169.1(C-9′),178.3(C-7)
(Nakatani et al.,2008).
4-O-Caffeoylquinic acid(2)  White amor-
phous powder,C16H18O9.1 H-NMR(500 MHz,
CD3OD)δ:2.00(1H,dd,J=8.5,13.1Hz,H-2ax),
2.07-2.22(3H,m,H-2eq,6ax,6eq),4.29(1H,ddd,
J=3.1,8.5,8.5Hz,H-5),4.29(1H,ddd,J=3.1,
3.1,5.2Hz,H-3),4.81(1H,dd,J=3.1,8.5Hz,H-
4),6.41(1H,d,J=16.0Hz,H-8′),6.79(1H,d,J
=8.5Hz,H-5′),6.98(1H,dd,J=2.0,8.5Hz,H-
6′),7.07(1H,d,J=2.0Hz,H-2′),7.67(1H,d,J=
16.0Hz,H-7′);13 C-NMR(125 MHz,CD3OD)δ:
38.1(C-2),41.6(C-6),65.7(C-5),70.1(C-3),76.8
(C-1),79.4(C-4),115.2(C-2′),115.7(C-8′),116.5
(C-5′),122.9(C-6′),128.0(C-1′),146.6(C-3′),
146.9(C-7′),149.2(C-4′),169.1(C-9′),178.5(C-7)
(Nakatani et al.,2008).
5-O-Caffeoylquinic acid(3)  White amor-
phous powder,C16 H18 O9.1 H-NMR(500 MHz,
CD3OD)δ:2.03-2.24(4H,m,H-2ax,H-2eq,6ax,
6eq),3.73(1H,dd,J=3.0,8.5Hz,H-5),4.17(1H,
ddd,J=3.1,3.1,5.2Hz,H-3),5.34(1H,ddd,J=
4.4,8.5,8.5Hz,H-4),6.28(1H,d,J=16.0Hz,H-
8′),6.78(1H,d,J=8.5Hz,H-5′),6.95(1H,dd,J
=2.0,8.5Hz,H-6′),7.05(1H,d,J=2.0Hz,H-
2′),7.56(1H,d,J=16.0Hz,H-7′);13 C-NMR(125
MHz,CD3OD)δ:38.2(C-2),38.8(C-6),71.3(C-3),
72.0(C-5),73.5(C-4),76.2(C-1),115.2(C-2′),
115.3(C-8′),116.5(C-5′),123.0(C-6′),127.8(C-
1′),146.7(C-3′),147.1(C-7′),149.5(C-4′),168.7
(C-9′),177.1(C-7)(Tamura et al.,2004).
4-O-Galoylquinic acid(4) White amorphous
powder,C14H16O10.1 H-NMR(500 MHz,acetone-
d6)δ:2.07-2.30(4H,m,H-2ax,2eq,6ax,6eq),4.41-
4.46(2H,m,H-3,5),4.92(1H,d,J=8.5Hz,H-
4),7.19(2H,s,H-2′,6′);13 C-NMR(125MHz,ace-
tone-d6)δ:37.5(C-2),41.7(C-6),64.3(C-3),68.5
(C-5),75.6(C-1),78.5(C-4),109.5(C-2′,6′),121.1
(C-1′),138.0(C-4′),145.1(C-3′,5′),166.0(C-7′),
175.1(C-7)(Nishimura et al.,1984).
5-O-Galoylquinic acid(5) White amorphous
powder,C14H16O10.1 H-NMR(400 MHz,acetone-
d6)δ:2.00-2.35(4H,m,H-2ax,H-2eq,6ax,6eq),
3.79(1H,dd,J=3.2,8.5Hz,H-4),4.14(1H,ddd,
J=3.2,3.2,5.2Hz,H-3),5.42(1H,m,H-5),7.12
(2H,s,H-2′,6′);13 C-NMR(100MHz,acetone-d6)
δ:36.6(C-6),40.3(C-2),68.3(C-3),72.6(C-5),73.9
(C-4),75.2(C-1),110.6(C-2′,6′),121.9(C-1′),
138.6(C-4′),145.8(C-3′,5′),1676(C-7′),169.6(C-
7)(Nishimura et al.,1984).
Oxygen radical absorbance capacity(ORAC)
of the al compounds were also compared(Table
1)and compounds 1-5 were observed to show the
strongest antioxidation activity (Prior et al.,
2005).Comparison of the values for 1-5 suggested
that quinic acid with coumaroyl group compounds
gave rise to a larger ORAC value among quinic acid
esters.(Measurement of the ORAC values method
reference to Huang et al.,2011)
Table 1 ORAC values of compounds 1-5
Compound  mmol Trolox equivalent/g
3-O-Caffeoylquinic adid(1) 13.26
4-O-Caffeoylquinic adid(2) 11.23
5-O-Caffeoylquinic adid(3) 13.77
4-O-Galoylquinic adid(4) 6.37
5-O-Galoylquinic adid(5) 5.63
  Acknowledgements The authors are grateful
to Mr.NING De-Sheng(Guangxi Key Laboratory
of Functional Phytochemicals Research and Utili-
7011期        黄永林等:红背山麻杆叶的化学成分研究(Ⅲ)—奎宁酸类化合物
zation)for NMR measurements.
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