共查询到20条相似文献,搜索用时 15 毫秒
1.
《合成化学》2004,(Z1)
As an important kind of intelligent materials, shape-memory materials have been received increasing attention on account of their interesting properties and potential applications in recent years. Particularly, the rise of shape-memory polymers by far surpasses well-known metallic shape-memory alloys in their shape-memory properties. The advantages of polymers compared to other materials are their easier availability and their wide range of mechanical and physical properties. The polymers des… 相似文献
2.
XU Xiao hua * YAO Guang min LU Jian hua LI Yan ming CHANG Jiang linInstitute of Elemento Organic Chemistry Nankai University Tianjin P.R. ChinaKONG Chui huaInstitute of Tropic Subtropical Ecology South China Agriculture Unive 《高等学校化学研究》2002,(2)
IntroductionTheredalgaofgenusLaurenciaiswell knowntobeusedtoproduceterpenoidsandC15acetogeni ue[1— 3] .WeinvestigatedthetropicalredalgaLau renciamajuscula ,colletedfromtheXishaIslandsintheSouthChinaSea ,andisolatednaturallyoccurringtricyclesesquiterpene ,poly… 相似文献
3.
Xu Qin LI Kun GAO Zhong Jian JIA* College of Chemistry Chemical Engineering National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 《中国化学快报》2002,13(10)
Chemical investigation of L.sagitta afforded two new eremophilenolides, which were identified as 6β-angeloyloxy-10β-hydroxy-8 β-methoxy-eremophil-7(11)-en-12, 8α-olide (1) and 6β, 8β-dimethoxy-10β-hydroxy-eremophil-7(11)-en-12, 8α-olide (2). Their structures were estab- lished by spectroscopic methods including 2D NMR experiments. 相似文献
4.
YiFengHAN XinLI KunGAO ZhongJianJIA 《中国化学快报》2005,16(4):491-493
Two new sesquiterpene lactone glycosides were isolated from the whole plant ofSonchus transcaspicus. Their structures were elucidated as 1β--O-β-D-glucopyranosy-5α, 6βH-eudesma-3-en-12, 6αt-olide and 1β--O-β-D-glucopyranosy-15-O-(p-hydroxylphenylacetate)-5α,6β H-eudesma-3, ll(13)-dien-12, 6α-olide by spectral methods (HRMS, 1D and 2D NMR). 相似文献
5.
QingZHAO XinHONG YunSongWANG ChengZOU XiaoJiangHAO 《中国化学快报》2003,14(11):1141-1143
Two new labdane diterpenes isolated from the rhizomes of Hedychium forrestii were determined by spectroscopic evidence to be labda-8(17), 11, 13-trien-7β-hydroxyl- 15(16)-olide (1,hedyforrestin B) and labda-8(17), 11, 13-trien-7β,16-dihydroxyl-16(15)-olide (2, hedyforrestinC). 相似文献
6.
XinDongGUO ZhiShuHUANG YaDanBAO LinKunAN LinMA LianQuanGU 《中国化学快报》2005,16(1):49-52
A new sesquiterpenoid lactone, 3,6,9-trimethyl-pyrano[2,3,4-de]chromen-2-one (1) and a novel sesquiterpenoid quinone, 6-[2-(5-acetyl-2,7-dimethyl-8-oxo-bicyclo[4.2.0]octa-l,3,5-trien-7-yl)-2-oxo-ethyl]-3,9-dimethylnaphtho[1,8-bc]pyran-7,8-dione (2) together with a known perezone (3) were isolated from the roots of Helicteres angustifolia. The structures were elucidated as mainly on the basis of ID and 2D NMR spectroscopic data. 相似文献
7.
ShiMingDENG YouXingZHAO YuQingLIU JunZHOU 《中国化学快报》2005,16(5):623-624
Two new xanthones, 1,6,8-trihydroxy-2,3-methylenedioxyxanthone 1 and 1,4-dihydroxy-6, 7-methylenedioxyxanthone 2, were isolated from the roots of Polygala crotalarioides. Their structures were elucidated by spectroscopic and chemical methods. 相似文献
8.
《中国化学快报》1997,(12)
InapreviouspaPer,wehadrcyortedonanew~enod,lungshengeninAl11(3),thefirstenhaUrendforidinwhichtherarebeOxy~sontheA-ring,isedfr0InIsodOnIhagSengensisC.Y.WuetH.W.LLapereInhalhdeofthcLabfor~,whichisdistriedinhagtwcountyoftheboZhUangAutonOInOUSheandisusedasanagatforthetreatIneIItofhrpandsinlocalfOlkmwhcine.theinvestighonofthisplantledtOtheisohaonoftW0newditmpenOdsnamcdaslungsh~B-C(l-2),ThispaPerdealsedthotStrUcturalclucidation.LUngshengedB(l),coloresscubescrystallizedfromcyclohexane,… 相似文献
9.
The phytochemical investigation on the ethanolic extracts of the barks of Taxus yunnanensis (Taxaceae) led to the isolation of two new neo-lignans, named taxuyunins A (1) and B (2), along with the known diterpenolignan, brevitaxin (3). Their structures were elucidated on the basis of spectroscopic and chemical evidences. Compound 1 is a neo-lignan xyloside while compound 2 belongs to the rare neo-lignan possessing a ramified C3 side chain. 相似文献
10.
A new furanoeremophilane and a new eudesmane were isolated from the roots of Ligularia veitchiana .Their structures were elucidated as 1 β,10β-epoxy-6β-isobutyryloxy-9-oxo-furanoeremophilane and 8α-hydroxy-4(15),11-eudesmadiene by spectroscopic methods. 相似文献
11.
Sincethediscoveryofthefamousanticanceragentpaclitaxel(Taxol@)',muchattentionhasbeenpaidbecauseofitsuniquetubulinactivity',aswellasitsnovelstructure3.Duetothescarcityofpaclitaxel,manykindsofmeasuresincludingsemisynthesis"',totalsynthesis"'andcellculture8havebeentaken.Searchingforpaclitaxelanalogsandprecursorsisthereforeanecessaryinvestigation.ThisledtotheisolationofnumeroustaxoidsfromvariousTaxusspecies'.Asacontinuationofourpreviousstudies"""",wehaveinvestigatedthebarkofTaxusyunnanensis,Cheng… 相似文献
12.
TwoNovelCellDivisionTypePGRsLIZheng-ming,QIAOLi-xin,ZHAOZhong-renandLIUTian-lin(Elewcoto-OrganicChernistryinstitute,NankazUni... 相似文献
13.
Two Benzyl Dihydroflavones from Phellinus igniarius 总被引:5,自引:0,他引:5
ShunYanMO WenYiHE YongChunYANG JianGongSHI 《中国化学快报》2003,14(8):810-813
Two new bcnzyl dihydroflavones phelligrins A and B were isolated from the fruit body of Phellinus igniarius. Their structrues were identified as 5, 7, 4‘-trihydroxy-6-O-hydroxybenzyl-dihydroflavone and 5, 7, 4‘-trihydroxy-8-O-hydroxybcnzyldihydroflavone, respectively, by means of spectral methods. 相似文献
14.
Two New Sesquiterpenes from Ligularia Intermedia 总被引:1,自引:0,他引:1
《中国化学快报》1996,(12)
TwoNewSesquiterpenesfromLigulariaIntermediaHongMingCHEN;MengShenCAI&ZhongJianJIA(SchoolofPharmaceuticalSciences,BeijingMedica... 相似文献
15.
Tong SHEN Wei Dong XIE Zhong Jian JIA 《中国化学快报》2005,16(9):1220-1222
Two new eremophilane sesquiterpenes, 15β-formic ether-6-oxo-furanoeremophilane (1) and 6α, 15β-epoxy eremophila-7(11)-en-8α, 12-olide (2) were isolation from the roots of Ligularia macrophylla. Their structures were deduced from spectroscopic methods and 2D NMR experiments. 相似文献
16.
What is the most favorite and original chemistry developed in your research group?Oxidative Cross-Coupling-The chemistry between two"nucleophiles".How do you get into this specific field?Could you please share some experiences with our readers?My first contact with palladium chemistry was the halopalladation of acetylene in 1998.Then I worked on palladium enolate and found it could initiate a transmetalation reaction.Until 2006,I found that desyl chloride(a halogenated hydrocarbon)showed different reactivity with orga no metallic reagents due to the halophilic and oxyphilic properties,thus we achieved the cross-coupling between two orga no metallic reagents. 相似文献
17.
ChaoYANG PengFeiWANG ZhongJianJIA 《中国化学快报》2003,14(5):485-486
Two new sesquiterpenes were isolaed from the aerial patrs of Inula Japonica.Their structures were eluicated as 1β-hydroxy-8β-acetoxyeostic acid methyl ester and 1β-hydroxy-8β-acetoxyisocostic acid mster by spectral methods. 相似文献
18.
Two New Saponins from Lysimachia davurica 总被引:3,自引:0,他引:3
JingKuiTIAN ZhongMeiZOU LiZhenXU GuangHongTU HongWuZHANG ShiLinYANG DongGeAN 《中国化学快报》2005,16(2):212-214
Two new saponins named davuricoside I (1) and davuricoside E (2) were isolated from the whole plants ofLysimachia davurica. Their structures were determined by 1D and 2D NMR, FAB-MS techniques, and chemical methods. 相似文献
19.
Yi Feng HAN Dong Qing FEI Kun GAO Zhong Jian JIA 《中国化学快报》2005,16(8):1053-1055
Chemical investigation of L. tongolensis afforded two new eremophilenolides, which were identified as 3β-(2'-methylbutanoyloxy)-8βH-eremophil-7(11)-en-12, 8α(14, 6α)-diolide (1)and 8βH-eremophil-3, 7(11)-dien-12, 8α (14, 6α)-diolide (2). Their structures were established by spectroscopic methods including 2D NMR experiments. 相似文献
20.
Nian Yun YANG Shi Hui QIAN Jin Ao DUAN Ping LI Li Juan TIAN 《中国化学快报》2005,16(9):1223-1226
Two new germacrane sesquiterpenes: 3,8,14-trihydroxy- 1 (10)E,4Z, 11 (13)-germacra- trien-12, 6-olide, 8-(2-methyl-4-hydroxyl-2E-butenoyl), 3,14-diacetoxy (eupalinolide A, 1), and 3,8,14-trihydroxy-1(10) E, 4E, 11(13)-germacratrien-12,6-olide, 8-2-methyl-4-hydroxyl-2E- butenoyl), 3,14-diacetoxy (eupalinolide B, 2) were isolated from Eupatorium lindleyanum. Their structures were elucidated by means of ^1H and ^13C NMR spectroscopic analysis, including 2D NMR technique. 相似文献