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Chemical constituents of Ancistrocladus tectorius

钩枝藤化学成分研究(英文)



全 文 :广 西 植 物 Guihaia Jul. 2013,33(4) :564-567 http:/ / journal. gxzw. gxib. cn
DOI:10. 3969 / j. issn. 1000-3142. 2013. 04. 025
易博,陈涛,冯世秀,等. 钩枝藤化学成分研究[J]. 广西植物,2013,33(4) :564-567
Yi B,Chen T,Feng SX,et al. Chemical constituents of Ancistrocladus tectorius[J]. Guihaia,2013,33(4) :564-567
Chemical constituents of Ancistrocladus tectorius
YI Bo1,3,CHEN Tao2* ,FENG Shi-Xiu2,LI Qing-Hui2,4
(1. Pharmacy Department,187 Hospital of PLA,Haikou 571159,China;2. Key Laboratory of Southern Subtropical
Plant Diversity,Shenzhen Fairy Lake Botanical Garden,Chinese Academy of Sciences,Shenzhen 518004,China;
3. South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China;4. College of
Life Sciences,Shenzhen University,Shenzhen 518060,China )
Abstract:The chemical constituents of the stems of Ancistrocladus tectorius were isolated by silica gel and Sephadex LH-
20 column chromatography,and the structures were elucidated on the basis of spectral analysis. The results showed that
five known dihydroflavoids(-)-epicatechin-3-gallate(1) ,3 3,5,5,7-pentahydroxyflavan(2) ,(-)-catechin(3) ,(-)-
Epicatechin(4) ,(-)-epigallocatechin(5)and one known phenolic compound(3,5-dimethoxy-4-hydroxyphenol)-1-O-β-
D-(6-O-galloyl)glucose(6)were obtained. Compounds 1,2,4-6 were reported for the first time from this species.
Key words:Ancistrocladus tectorius;chemical constituents;dihydroflavoids;phenolic compound
中图分类号:Q946 文献标识码:A 文章编号:1000-3142(2013)04-0564-04
钩枝藤化学成分研究
易 博1,3,陈 涛2* ,冯世秀2,李庆辉2,4
(1. 解放军第 187医院药剂科,海口 571159;2. 深圳市中科院仙湖植物园 深圳市南亚热带植物多样性重点实验室,
深圳 518004;3. 中国科学院 华南植物园,广州 510650;4. 深圳大学 生命科学学院,深圳 518060 )
摘 要:采用 95%乙醇提取,石油醚、乙酸乙酯萃取分部,利用反复硅胶柱和凝胶柱色谱进行分离、纯化,根据
波谱技术鉴定结构,研究钩枝藤茎中的化学成分。结果发现:分离得到 5 个已知二氢黄烷类化合物(-)-表儿
茶素-3-没食子酸酯(1)、3,3,5,5,7-五羟基黄烷(2)、(-)-儿茶素(3)、(-)-表儿茶素(4)、(-)-表没食子酸儿
茶素(5)和 1个酚类化合物(3,5-二甲氧基-4-羟基苯酚)-1-O-β-D-(6-O-没食子酸)葡萄糖苷(6)。其中化合物
1、2、4-6均为首次从该植物分离得到。
关键词:钩枝藤;化学成分;二氢黄烷;酚类
Ancistrocladus tectorius is a special tropical liana of
the small palaeotropic families Ancistrocladaceae,with
only one genus and one species distributes in southeast
China. It was reported to be the only plant resource
known to produce naphthylisoquinoline alkaloids,which
possessed probable anti-infective activities against proto-
zoic pathogens of the famous tropical diseases like ma-
laria,trypanosomiasis and leishmaniasis,as well as anti-
HIV and anti-tumor activities. Phytochemical investiga-
tions of this species by different groups in China
reported the identification of over 20 novel anphthyliso-
quinoline alkaloids(Liu et al.,2008,Tang et al.,2010;
Xu et al.,2010). However,other chemical constituents
in this plant were nearly ignored with the only report of
收稿日期:2012-11-24 修回日期:2013-02-02
基金项目:深圳市城市管理局项目(201316);深圳市中科院仙湖植物园科技项目(30973635)
作者简介:易博(1978-),男,湖南湘阴县人,博士,主管药师,主要从事天然产物化学和医院药学研究,(E-mail)boyicn@ 126. com。
* 通讯作者:陈涛,博士,研究员,主要从事植物分类学研究,(E-mail)taochen. mobg@ gmail. com。
several phenol and flavone compounds (Su et al.,
2007).
In our current work,the liposoluble fraction of the
EtOH extract of A. tectorius was studied,as a result in
the isolation of dihydroflavones and phenolic compound.
1 Materials and Methods
The 1H(400 MHz) ,13C(100 MHz)and 2D NMR
spectra were recorded on a Bruker DRX-600 instrument
using TMS as internal standard. HRESI-MS data were
obtained on a MAT 95XP Thermo mass spectrometer.
Optical rotations were obtained on a Perkin-Elmer 341
polarimeter with MeOH as solvent. The UV spectrum
was recorded in MeOH on a Perkin Elmer Lambda 25
UV-VIS Spectrophotometer. For column chromatography
(CC) ,silica gel(200-300 mesh;Qingdao Puke Isolation
Material Co.) and Sephadex LH-20 (Mitsubishi
Chemical Holdings Co.)were used.
The stems of A. tectorius were collected in Hainan
Province of southern China in November,2010,and i-
dentified by Professor Chen Tao(Shenzhen Fairy Lake
Botanical Garden). A voucher specimen(20101109N)
was deposited at the herbarium of Shenzhen Fairy Lake
Botanical Garden.
2 Extraction and Isolation
The air dried material(10 kg)were powered and
extracted with 95% EtOH at r. t. The combined extracts
were concentrated to give a residue(730 g) ,which was
suspended in H2O and partitioned with petroleum ether
(PE;60-90 ℃) ,AcOEt and n-BuOH,successively,to
give an EtOAc-soluble fraction(235 g).
The AcOEt soluble fraction(235 g)was subjected to
a silica gel chromatography column(CC)and eluted with
a gradient CHCl3-MeOH(95 ∶ 5 to 60 ∶ 40)to yield four-
teen fractions,Frs. 1-14. Fr. 3(3. 5 g)was repeatedly
subjected to silica gel CC using CHCl3-MeOH(92 ∶ 8)to
obtained seven subfractions Frs. 3a-3g. Frs. 3c(310 mg)
and 3d(260 mg)were purified by Sephadex LH-20
eluting with MeOH to get compound 2(18 mg)and 3(26
mg),respectively. Fr. 4(2. 8 g)was separated over
Sephadex LH-20 CC using MeOH:CHCl3(1 ∶ 3)to yield
ten subfractions Frs. 4a-4j. Frs. 4c (300 mg) was
purified by silica gel CC using PE– acetone 3 ∶ 1 to af-
ford compound 4(41 mg). Frs. 4h(90 mg)was purified
by PE-EtOAc(3 ∶ 1)to get compound 1(20 mg). Fr. 5
(2. 3 g)was submitted further to silica gel CC and eluted
with CHCl3-MeOH-H2O(100 ∶ 11 ∶ 1),further purified by
Sephadex LH-20 using MeOH to get compound 5(18
mg). Fr. 6(2. 0 g)was subjected to repeated silica gel
CC eluting with CHCl3-MeOH-H2O(100 ∶ 11 ∶ 1)to get
compound 6(32 mg).
3 Results and Analysis
(-)-Epicatechin-3-gallate(1) White power. HR-
ESI-MS m/z 441. 0825[M-H]-(calcd for C22H17O10,Δ-
0. 45 ppm). ESI-MS m/z 443. 1[M+H]+,465. 1[M+
Na]+,441. 0[M-H]-,883. 0[2M-H]-.[α]20D:- 230°(c
=1. 0,MeOH). UV /Vis λmax(MeOH)nm(log ε) :204
(3. 12) ,277(2. 01). 1H NMR(CD3OD) :δ 5. 00(1H,
s,H-2) ,5. 51(1H,m,H-3) ,2. 85(1H,dd,J =14. 0,2. 4
Hz,H-4a) ,2. 96(1H,dd,J=14. 0,4. 8 Hz,H-4b) ,5. 95
(1H,d,J=2. 0 Hz,H-6) ,5. 93(1H,d,J = 2. 0 Hz,H-
8) ,6. 92,d(1H,d,J = 2. 0 Hz,H-2) ,6. 68(1H,d,J =
8. 0 Hz,H-5) ,6. 79(1H,dd,J = 2. 0,8. 0 Hz,H-
6) ,6. 94(2H,s,H-3″ and 5″) ;13C NMR(CD3OD,
150 MHz) :77. 2(C-2) ,68. 6(C-3) ,25. 5(C-4) ,
156. 4(C-5) ,96. 5(C-6) ,156. 4(C-7) ,94. 0(C-
8) ,155. 8(C-9) ,98. 0(C-10) ,130. 0(C-1) ,113.
7(C-2) ,144. 5(C-3) ,144. 5(C-4) ,114. 7(C-
5) ,118. 0(C-6) ,120. 0(C-1″) ,108. 0(C-2″ and
C-6″) ,144. 9(C-3″ and C-5″) ,138. 4(C-6″) ,166. 2
(C-7″) (Li et al.,2008).
3,3,5,5,7-pentahydroxyflavan(2) White
power.[α]20D:0°(c=1. 0,MeOH). ESIMS:m/z 291. 0
[M+H]+,313. 1[M+Na]+,288. 8[M– H]–;1H NMR
(DMSO-d6,600 MHz) :δ 9. 11(1H,s,5-OH) ,8. 90
(1H,s,3-OH) ,8. 81(1H,s,5-OH) ,8. 72(1H,s,7-
OH) ,6. 88(1H,brd,J=1. 6 Hz,H-2) ,6. 65(1H,d,J =
1. 6 Hz,H-6) ,6. 65(1H,brs,H-4) ,5. 88(1H,d,J=2.
0 Hz,H-8) ,5. 71(1H,d,J =2. 0 Hz,H-6) ,4. 72(1H,
brs,H-2) ,3. 98(1H,brs,H-3) ,2. 69(1H,dd,J = 4. 0,
4. 4 Hz,H-4a) ,2. 44(1H,dd,J=4. 0,4. 4 Hz,H-
5654期 易博等:钩枝藤化学成分研究
Fig. 1 Chemical structures of compounds 1-6
4b) ;13C NMR(DMSO-d6,150 MHz) :δ 78. 1(C-2) ,64.
9(C-3) ,28. 2(C-4) ,155. 8(C-5) ,94. 1(C-6) ,156. 2
(C-7) ,95. 1(C-8) ,156. 5(C-9) ,98. 5(C-10) ,130. 6
(C-1) ,114. 8(C-2) ,144. 5(C-3) ,118. 0(C-4) ,
144. 5 (C-5) ,114. 9 (C-6) (Samaraweera et al.,
1983).
(-)-catechin(3) White power.[α]20D:- 23°(c
=1. 0,MeOH). ESIMS:m/z 288. 8[M-H]-,579. 1[2M-
H]-,291. 1[M + H]+,313. 3[M + Na]+ . 1H NMR
(DMSO-d6,600 MHz) :δ 6. 88(1H,d,J = 2. 0 Hz,H-
2) ,6. 75(1H,dd,J = 8. 0 and 2. 0 Hz,H-6) ,6. 79
(1H,d,J = 8. 0 Hz,H-5) ,5. 87(1H,d,J = 2. 0 Hz,H-
6) ,6. 01(1H,d,J= 2. 0 Hz,H-8) ,4. 56(1H,d,J =7. 5
Hz,H-2) ,3. 98(1H,ddd,J=8. 2,7. 5,5. 4 Hz,H-3) ,2.
90(1H,dd,J = 16. 1,8. 1 Hz,H-4a) ,2. 51(1H,J = 16.
0,4. 6 Hz,H-4b) ;13C NMR(150 MHz,DMSO-d6) :82. 7
(C-2) ,68. 3(C-3) ,28. 8(C-4) ,157. 7(C-5) ,96. 1(C-
6) ,157. 1(C-7) ,95. 4(C-8) ,156. 9(C-9) ,100. 7(C-
10) ,132. 2(C-1) ,115. 7(C-2) ,145. 7(C-3) ,145. 6
(C-4) ,115. 2(C-5) ,120. 1(C-6) (Cai et al.,1991).
(-)-Epicatechin(4) White power.[α]20D:-58°
(c = 1. 0,MeOH). ESIMS:m/z 288. 6[M-H]-,291. 1
[M+H]+,313. 1[M+Na]+ . 1H NMR(DMSO-d6,600
MHz) :δ 6. 90(1H,d,J =2. 0 Hz,H-2) ,6. 75(1H,dd,
J=8. 0 and 2. 0 Hz,H-6) ,6. 70(1H,d,J =8. 0 Hz,H-
5) ,5. 86(1H,d,J=2. 0 Hz,H-6) ,5. 88(1H,d,J =2. 0
Hz,H-8) ,4. 76(1H,brs,H-2) ,4. 11(1H,m,H-3) ,2.
82(1H,dd,J = 16. 1,5. 6 Hz,H-4a) ,2. 70(1H,J = 16.
1,4. 4 Hz,H-4b) ;13C NMR(DMSO-d6,150 MHz,) :δ
79. 9(C-2) ,67. 5(C-3) ,29. 2(C-4) ,158. 0(C-5) ,96. 4
(C-6) ,157. 7(C-7) ,95. 9(C-8) ,157. 4(C-9) ,100. 0
(C-10) ,132. 3(C-1) ,115. 9(C-2) ,145. 9(C-3) ,
145. 8(C-4) ,115. 3(C-5) ,119. 4(C-6) (Cui et al.,
2005).
(-)-epigallocatechin (5 ) White power.
[α]20D:-28°(c = 1. 0,MeOH). ESIMS:m/z 304. 8[M-
H]-,307. 1[M + H]+,329. 1[M + Na]+ . 1H NMR
(CD3OD,600 MHz,) :δ 6. 39(2H,d,J = 2. 0 Hz,H-2
and H-6) ,5. 90(1H,d,J=2. 0 Hz,H-6) ,5. 84(1H,d,
J=2. 0 Hz,H-8) ,4. 74(1H,brs,H-2) ,4. 15(1H,m,H-
3) ,2. 82(1H,dd,J = 16. 1,5. 0 Hz,H-4a) ,2. 72(1H,J
=16. 1,4. 6 Hz,H-4b) ;13C NMR(CD3OD,150 MHz) :
δ78. 4(C-2) ,66. 1(C-3) ,27. 7(C-4) ,155. 9(C-5) ,94.
9(C-6) ,156. 5(C-7) ,94. 4(C-8) ,156. 6(C-9) ,98. 6
(C-10) ,130. 1(C-1) ,105. 7(C-2) ,145. 2(C-3) ,
132. 1(C-4) ,145. 2(C-5) ,105. 7(C-6) (Li et al.,
2008).
(3,5-dimethoxy-4-hydroxyphenol)-1-O-β-d-(6-O-
665 广 西 植 物 33卷
galloyl)glucose(6) Yellow power. 1H NMR(600
MHz,CD3OD,δ,ppm,J /Hz) :6. 40(2H,brs,H-3 and
H-5) ,7. 05(2H,brs,H-2″ and 6″) ,3. 64(6H,s,2-OCH3
and 6-OCH3) ,4. 72(1H,d,J = 7. 5,H-1) ,3. 72(1H,
m,H-2) ,3. 38-3. 50(3H,m,H-3,4 and 5) ,4. 59(1H,
d,J= 12. 0 Hz) ,4. 41(1H,dd,J = 11. 8,4. 8 Hz). 13C
NMR(CD3OD,150 MHz) :150. 9(C-1) ,95. 5(C-2 and
6) ,147. 9(C-3 and 5) ,131. 0(C-4) ,102. 6(C-1) ,
102. 6(C-1) ,73. 5(C-2) ,76. 2(C-3) ,70. 3(C-4) ,
74. 3(C-5) ,63. 7(C-6) ,119. 0(C-1″) ,108. 7(C-2″
and 6″) ,145. 1(C-3″ and 5″) ,138. 5(C-4″) ,166. 8(C-
7″) ,55. 2 (3-OCH3and 5-OCH3) (Lampire et al.,
1998).
Acknowledgements This work was supported by
the Shenzhen Fairy Lake Botanical Garden Fund
of 2012.
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