acetoxy相关论文
A water-soluble polymeric UV-absorber with polyvinylamine as backbone and benzotriazole type UV absorber as anti-UV func......
ECD spectrometric methods for detecting the enantioselective enzymatic hydrolysis of racemic 3-aceto
(-)-(3R,4S)-3-Acetoxy-4-phenylazetidin-2-one((-)-1) was the key intermediate for preparing optical C-13 side-chain moiet......
The new title compound 4-chloro-N-(2-(2-nitrophenyl)acetoxy)-N-(m-tolyl)benzamide(C22H17ClN2O5, Mr = 424.82) has been sy......
采用多种色谱技术对多花蒿Artemisia myriantha干燥地上部分95%乙醇提取物中的倍半萜类成分进行化学成分研究,分离得到13个化合物......
Potassium bromide or sodium chloride catalyzed acetoxyselenenylation of alkenes with diselenides and
KBr or NaCI is found to be a good catalyst in Se-Se bond cleavage of diselenides in the present of the oxidant mCPBA.The......
Umpolung is a fundamental concept in organic chemistry, which provides an alternative strategy for the synthesis of targ......
Synthesis,Crystal Structure and Anti-ischemic Activity of(E)-1-(4-(Bis(4-methoxyphenyl)methyl)pipera
A new cinnamide derivative,(E)-1-(4-(bis(4-methoxyphenyl)methyl)piperazin-1-yl)-3-(4-acetoxy-3-methoxyphenyl)prop-2-en-1......
Studies on Tripolycyanamide Formaldehyde Resin-Pd Complex and Its Use in the Synthesis of the Branch
A novel method was developed to prepare the branch of paclitaxel using 2,4-dichlorophenylaldehyde as the starting materi......
Syntheses of 4 novel chiral azetidin 2 one derivatives, which were characterized by 1H NMR, IR, specific rotatio......
Microbial hydrolysis of 17β-acetoxy steroidal compounds during aromatization by Arthrobacter simplex
Steroidal compounds containing 17β-acetoxy group after aromatization by Arthrobactersimplex afforded 17β-hydroxy-,17-......
Intramolecular energy transfer between chromophores separated by a rigid steroid bridge——Ⅰ.Singlet a
Intramolecular transfer of both singlet and triplet electronic excitation between thenaphthalene moiety and the carbony......
Chilobolide A,C_(22)H_(30)O_5,M.W.=374.5,orthorhombic,space group P 2_12_12_1,a=8.753(2),b=8.887 (3),c=54.247 (14) ,V=4......
Studies on the chemical constituents of Eucalyptus robusta Sm.——Isolation and identification of robu
Nine known compounds, 5-hydroxy-4’,7-dimethoxy-6, 8-dimethylflavone, 4’,5-dihydroxy-7-methoxy-6, 8-dimethyIflavone, 3......
In this paper the catalytic behaviour of tetravalent molybdenum catalyst system in polymeriza-tion of butadiene is deal......
An efficient synthetic route have been developed to 16-acetoxy-6,7-didehydroferruginyl methyl ether.
An efficient synth......
The crystal structure of the title compound C 17H 24ClO 4P ( M r =358 77), has been determined by single crystal......
Two new ent-kaurane diterpenoids, xerophilusin E (1) and xerophilusin F (2), were isolated from the leaves of Isodon xer......
A new triterpenoid, urs-20-en-3β-acetoxy-22α-ol, and three known compounds 3β- acetoxy-amyrin, 3β-acetoxy-lupeol, l......
Two new β-dihydroagarofuran sesquiterpenes were isolated from Euonymus phellomana Loes. and their structures were estab......
A new abietane quinone diterpenoid was isolated. together with horminone. 16- acetoxy-7-0-acetyhorminone. β-sitosterol.......
From the barks of Taxus yunnanensis, a new paclitaxel-related compound, 7-xylosyl-taxol D (1), and three new 11(15?1)-ab......
Two new ent-kaurane-type diterpenoids,6β,7β,13α-trihydroxy-1α-acetoxy-7α,20-epoxy-ent-kaur-16-en-15-one(1)and 15β-......
Two novel diterpenes, Euphorprolitherin A (1) and Euphorprolitherin B (2), were isolated from the roots of Euphorbia pro......
a new highly oxygenated eremophilenolide was isolated from Ligulariopsis shichuana. Its structure was elucidated by NMR ......
A new eudesmanoilde was isolated from the aerial parts of Carpesium macrocephalum. Its structure was elucidated as 2?ace......
From the stem bark of Sapium sebiferum a new triterpenoid, named sebiferone (1), was isolated. The structure of the new......
Two new chromone glycosides, 5-hydroxy-2,6,8-trimethylchromon-7-O-b-D-gluco- pyranoside, named uncinoside A; 5-acetoxy-2......
In order to chitracterizc the speclrum of mutallon indueed by glyeidyl methacrylule(GMA ), the plasmid pBR322 was modi......
目的研究广西草药血党Ardisia punctata的化学成分。方法应用正相和反相硅胶柱色谱对血党的化学成分进行分离,并根据理化常数测定......
从长叶香茶菜Rabdoisa stracheyi(Benth ex Hook.f)Hara的地上部分分离得到三种结晶性成分。其中两种为已知化合物6,7-dehydroroyl......
从中药山柰的混杂品种苦山柰根茎分得一个新二萜苦山柰萜醇(marginatol 1) 和5个已知化合物：8(14),15-sanderacopimaradiene-1α,9......
作者从西藏红豆杉 Taxus wallichinanaZucc.针叶中分得一新的紫杉碱类成分5α-O-(3′-二甲氨基-3′-苯丙酰基)红豆杉素 M[5α-O-(......
目的 为了进一步研究红豆杉中的紫杉烷二萜类化合物 ,对生长在我国的云南红豆杉 Taxus yunnanensis进行深入的化学研究。方法 云......
目的 对石竹科植物多荚草Polycarponprostratum的化学成分进行研究。 方法 采用硅胶柱层析进行分离和纯化 ,通过波谱分析进行结......
介绍了大戟科巴豆属植物中二萜类化学成分及其药理活性的研究进展.二萜类化合物是该属植物的特征性成分,以克罗烷型、贝壳杉烷型为......
二萜佛司可林I、J、K、L,已从毛喉鞘蕊花分离得到。本文根据一维和二维的核磁共振谱详细描述了它们的光谱特征,二萜佛司可林K、L是......
目的:研究齐藤凹顶藻Laurencia saitoi化学成分,并对单体化合物进行细胞毒活性筛选。方法:采用正相硅胶柱色谱、Sephadex LH-20凝......
Two new 19-oxygenated ent-kaurane diterpenoids,pharicinins D and E(1 and 2),together with an artifact,pharicinin D aceta......
A new polyacetylene glycoside,(1,3Z,11E)-tridecatriene-7,9-diyne-5-hydroxyl-6-O-β-D-glucopyranoside,was isolated from t......
目的:研究南欧大戟全草的化学成分。方法:采用硅胶柱色谱、凝胶柱色谱和MCI等分离纯化化合物,利用ESI-MS,IR,NMR确定化合物的结构......
从南刘寄奴中分离并鉴定了14个化合物,分别为zhepiresinol(1),(-)-lariciresinol(2),ficusal(3),medioresinol(4),(+)-syringaresi......
AIM:To isolate and characterize solid tumor inhibitory and other constituents from a bioactive extract of Casimiroa tetr......
Stereoselective synthesis of (5R,6S)-6-acetoxy hexadecanolide——The major component of the ovipositio
A concise synthesis of the mosquito oviposition attractant pheromone, (-)-(5R, 6S)- and(+)-(5S 6R)-6-acetoxy hexadecano......
Intramolecular energy transfer between chromophores separated by a rigid steroid bridge Ⅱ.Energy tra
The singlet-singlet intramolecular energy transfer between naphthalene moiety and dansylgroup held apart by a rigid ste......
