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Diterpenoids from Rabdosia Nervosa

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Chemical Research in Chinese Universities 1989年第3期5卷 250-254页

作者： Bai Guang, Chen Yaozu and Meng Xianjun (department of chemistry, lanzhou university, {3.)

Six ent-kaurene type diterpenoids were isolated from the leaves of Rabdosia nerwsa. Among ***-vosin A and B are new compounds, the structures of which were elucidated as 1 and 2 respectively by spectral and chemical methods. The other four were identified as odonicin (3., novelrabdosin (4), nodosin (5) and shikokianal acetate (8). Compounds (1), (2), (5) and (8) have not been found in this herb previously.

关键词： Rabdosia nervosa Diterpenoids Herb

An Important Rule-Jeans Rule

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紫金山天文台台刊 1996年第3期15卷 93-97页

作者： Gao Chong-yi department of Physics,lanzhou university,lanzhou,73.000,china

From theoretical physics,Jeans rule can be derived *** is applicable to the planets,satellites,asteroids and meteoroids in the solar *** condition satisfying Jeans rule,is just the necessary condition for a given spec... 详细信息

关键词： An Important Rule-Jeans Rule net

Two New Eremophilenolides from Ligularia fischeri

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Chinese Chemical Letters 1999年第7期10卷 571-572页

作者： Wen Shu WANG Kun GAO Zhong Jian JIA(department of chemistry. National Laboratory of Applied Organic chemistry {3. Vniversity. lanzhou 73.000) department of chemistry National Laboratory of Applied Organic Chemistry Lanzhou University

Chemical investigation of L. fischeri afforded two new eremophilenolides. which were identified as 6 beta-methoxy-8 beta-hpdroxy-eremophil-7(11)-en-12,8 alpha-olide 1; 6-oxo-8 beta-hydroxy-eremophil-7(11)-en- 12.8 alp... 详细信息

关键词： Ligularia fischeri compositae eremophilenolide sesquiterpene

Total Synthesis of Several 3. 3.-Biflavones

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Chinese Chemical Letters 1998年第4期9卷 347-349页

作者： Lian Yun ZHAO Xian Yong BU Yu Lin LI Wen CEN Ya Cheng XING(National Laboratory of Applied Organic chemistry, lanzhou Univcrsity, lanzhou 73.000 {3. of chemistry, Qingdao university, Qingdao 266071) Natl. Lab. of Appl. Organ. chemistry Lanzhou University Lanzhou 730000 China department of chemistry Qingdao University Qingdao 266071 China

Three 3. 3.-biflavones were synthesized by using iodination of flavones through I-2-CAN system as the key step followed by the coupling of 3.iodoflavones under the Ullmann reaction conditions.

关键词： 3.3.''-biflavones synthesis coupling 3.iodoflavones Ullmann reaction

SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF 3.6-DISUBSTITUTED S-TRIAZOLO[3.4-b]-1,3.4-THIADIAZOLES

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Chinese Chemical Letters 1991年第4期2卷 277-278页

作者： Zi Yi ZHANG Xin CHEN department of chemistry,lanzhou {3.,lanzhou 73.000

A series of 3.6-disubstituted s-triazolo[3.4-b]-1,3.4-thiadiazoles have been synthesized,whose structures were determined by elemental and spectral analyses;all the new compounds showed significant antibacterial activ... 详细信息

关键词： DMF 甲酰胺 SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF 3.6-DISUBSTITUTED S-TRIAZOLO[3.4-b THIADIAZOLES

Studies　on　the　Synthesis　and　Crystal　Structure　of　5－（3.－methylphenyl）－2H－tetrazol－2－ylacetic　acid

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Chemical Research in Chinese Universities 1994年第4期10卷 373-376页

作者： ZHANG Zi-yi and ZOU Ning(department of chemistry, lanzhou university . {3., 73.000)

ＳｔｕｄｉｅｓｏｎｔｈｅＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ５－（３＇－ｍｅｔｈｙｌｐｈｅｎｙｌ）－２Ｈ－ｔｅｔｒａｚｏｌ－２－ｙｌａｃｅｔｉｃａｃｉｄＺＨＡＮＧＺｉ－ｙｉａｎｄＺＯＵＮｉｎｇ... 详细信息

ＳｔｕｄｉｅｓｏｎｔｈｅＳｙｎｔｈｅｓｉｓａｎｄＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆ５－（３＇－ｍｅｔｈｙｌｐｈｅｎｙｌ）－２Ｈ－ｔｅｔｒａｚｏｌ－２－ｙｌａｃｅｔｉｃａｃｉｄＺＨＡＮＧＺｉ－ｙｉａｎｄＺＯＵＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍ...

关键词： H-tetrazole Synthesis Crystal structure

A New Iridoid Glycoside and a New Iridoid from Pedicularis kansuensis f. albiflora

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Chinese Chemical Letters 2003年第9期14卷 932-933页

作者： Cheng Shan YUAN, Wei Dong XIE, Xiu Ping YANG, Zhong Jian JIAdepartment of chemistry, National Laboratory of Applied Organic chemistry,{3.,lanzhou 73.000 department of chemistry National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000

A new iridoid glycoside 1 and a new iridoid 2 were isolated from the whole plant of Pedicularis kansuensis f. albiflora. Their structures were elucidated by spectroscopie methods.

关键词： Pedicularis kansuensis f. albiflora Scrophulariaceae iridoid glycoside iridoid.

Studies on Acylthiosemicarbazides and Related Heterocycles(ⅪⅤ)——Synthesis and Bactericidal Activity of 1-(5-(3.Pyridyl)-2H-Tetrazol-2-ylacetyl) -4-Arylthiosemicarbazides and 3. (5- (3.Pyridyl)-2H-Tetrazol-2-ylmethyl)-4-Aryl-1,2 ,4-Triazole-5-Thiones

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Chemical Research in Chinese Universities 1991年第3期7卷 193-196页

作者： Zhang Ziyi, Chen Limin and Wu Hepin (department of chemistry, lanzhou university, {3.)

Introduction In the preceding paper it was described that various 1-acyl-4-substituted thiosemicarbazides and their derivatives exhibited a broad spectrum of antibacterial activities. Kothari pointed out that some heterocycles linked with tetrazole and 1,2,4-triazole can be used as antiinflammatory agent. We have also demonstrated that both 3.(5-a- naphthyl)-2H-tetrazol-2-ylmethyl)-4-aryl-1,2,4-triazole-5-thiones and 3.(3.pyridyl)-

关键词： Arylthiosemicarbazide 1 2,4-Triazol-5-thione Bactericidal

Studies on the Solvent Effect of N-Carbamoyl-N-(1-Oxyl 2,2,5,5-Tetramethyl-Pyrrolin-3.yl) Ureas

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Chemical Research in Chinese Universities 1990年第1期6卷 20-27页

作者： Zhang Ziyi and Wei Lulin (department of chemistry, university of {3., {3.)Wang Hanqing ({3. Institute of Chemical Physics, Acoiemia Sinica, {3.)

The electron spin resonance spectra of N-carbamoyl-N-(l-oxyl-2,2,5,5-tetramethyl-pyrrolin-3.yl) urea compounds in ten solvents with different polarities were determined. It was found that the hyperfine splitting constant AN and spin density pN. as well as the energy difference between two adjacent energy levels E of different pyrroline nitroxides in the same solvent increase with the increase of electron-withdrawing α-bility of the substituted groups on the aromatic ring. There was a linear correlation between AN and Reichardt ET value, and between AN and Z value as well. Such a linear correlation was also found between solvent viscosity n and ESR rotational correlation time r. On the other hand, the correlation between T and the relative height hr of peak on high field was reverse. The results are discussed in the paper.

关键词： Solvent effect Ureas Pyrroline nitroxides