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Two New Iridoid Glycosides from Caryopteris mongholica

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Chinese Chemical Letters 2000年第4期11卷 319-322页

作者： Yong Hong zhang Dong Liang CHENG (department of chemistry, National laboratory of applied organic chemistry, lanzhou university, lanzhou 730000) lanzhou Univ Dept Chem Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China

Two new iridoid glucosides were isolated from the whole plant of Caryopteris mongholica Bunge. On the basis of chemical and spectral evidence, they were determined as 8-acetyl-6'-O-(p-coumaroyl)harpagide and 6'-O-(p-c... 详细信息

关键词： Caryopteris mongholica verbanaceae 8-acetyl-6 '-O-(p-coumaroyl)harpagide 6 '-O-(p-coumaroyl)antirrinoside

Synthesis of substituted benzoxazoles by the iron(Ⅲ)-catalyzed aerobic oxidation process

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Science china chemistry 2010年第1期53卷 130-134页

作者： CAO Ke,TU YongQiang & zhang FuMin P State Key laboratory of applied organic chemistry and department of chemistry,lanzhou university,lanzhou 730000,china State Key laboratory of applied organic chemistry and department of chemistry Lanzhou University Lanzhou China

The FeCl3-catalyzed aerobic oxidation process for the synthesis of benzoxazoles,benzothiazole and benzimidazole has been *** method has proved to be effective to a wide range of substrates,and it has been applied for ... 详细信息

关键词： iron oxidation benzoxazole JTP-426467 carbon-heteroatom bond formation

Photoinduced self-substitution of haloquinones

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Chinese Journal of chemistry 1994年第5期12卷 456-463页

作者： LIU, Zhong-Li zhang, Mao-Xi CHEN, yi-Wen YANG, Li LIU, You-ChengNational laboratory of applied organic chemistry, lanzhou university, lanzhou, gansu 730000, china National laboratory of applied organic chemistry Lanzhou University Lanzhou Gansu 730000 China

A series of novel oligo(halobenzoquinoid) compounds have been obtained from the photoinduced self-substitution of 2,5-dibromo-1,4-benzoquinone (1a), 2,6-dibromo-1,4-benzoquinone (1b), 2-chloro-1,4-benzoquinone (1c), 2-bromo-5-chloro-1,4-benzoquinone (1d), 2,3,5,6-tetrachloro-1,4-benzoquinone (1e) and 1,4-benzoquinone (1f) in the presence of N,N-dimethyl-t-butylamine (2) in acetonitrile. Dimers, trimers and/or pentamers of these haloquinones were found to be the major products.

关键词： PhotoreEtction haloquinones oligomers.

Tandem Lewis acid catalyzed coupling/semipinacol rearrangement of allylic alcohol

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Science china chemistry 2010年第1期53卷 147-150页

作者： YUAN Daoyi,zhang YongQiang,TU YongQiang,CHEN ZhiHua & ZHAO Xiong State Key laboratory of applied organic chemistry department of chemistry,lanzhou university,lanzhou 730000,china 1. State Key laboratory of applied organic chemistry department of chemistry Lanzhou University Lanzhou 730000 China

Construction of the polyaryl quaternary unit through a ZnBr2 catalyzed tandem coupling/semipinacol rearrangement participated by allylic cations was reported for the first time.

关键词： coupling semipinacol rearrangement allylic cation quaternary center

Studies on Acylthiosemicarbazides and Related Heterocycle（XXIII）──Synthesis and Bactericidal Activity of　5－（5－（3－pyridyl）－2H－tetrazole－2－ylmethyl）－2－arylamino－1，3，4－oxadia－zoles

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Chemical Research in Chinese Universities 1994年第2期10卷 151-155页

作者： WU He-ping CHEN Li-min and zhang zi-y(department of chemistry, National laboratory of applied organic chemistry, lanzhou university, lanzhou, 730000)

ＳｔｕｄｉｅｓｏｎＡｃｙｌｔｈｉｏｓｅｍｉｃａｒｂａｚｉｄｅｓａｎｄＲｅｌａｔｅｄＨｅｔｅｒｏｃｙｃｌｅ（ＸＸＩＩＩ）──ＳｙｎｔｈｅｓｉｓａｎｄＢａｃｔｅｒｉｃｉｄａｌＡｃｔｉｖｉｔｙＯｆ５－（５－（３－ｐｙｒｉｄ... 详细信息

ＳｔｕｄｉｅｓｏｎＡｃｙｌｔｈｉｏｓｅｍｉｃａｒｂａｚｉｄｅｓａｎｄＲｅｌａｔｅｄＨｅｔｅｒｏｃｙｃｌｅ（ＸＸＩＩＩ）──ＳｙｎｔｈｅｓｉｓａｎｄＢａｃｔｅｒｉｃｉｄａｌＡｃｔｉｖｉｔｙＯｆ５－（５－（３－ｐｙｒｉｄｙｌ）－２Ｈ－ｔｅｔｒａｚｏｌｅ－...

关键词： Acylthiosemicarbazides 1 ,3,4-oxadiazole Bactericidal

Oxyfunctionalization of ketones bearing α-methylene group with piperidine oxoammonium *** of α-diketones from monoketones

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Chinese Journal of chemistry 1996年第3期14卷 252-258页

作者： LIU, You-Cheng REN, Tan GUO, Qing-Xiang National laboratory of applied organic chemistry, lanzhou university,lanzhou, gansu 730000, china department of Modern chemistry, university of Science and Technology of china,Hefei, Anhui 230026, china National laboratory of applied organic chemistry Lanzhou University Lanzhou Gansu 730000 China department of Modern chemistry University of Science and Technology of China Hefei Anhui 230026 China National laboratory of applied organic chemistry Lanzhou University Lanzhou Gansu 730000 China National laboratory of applied organic chemistry Lanzhou University Lanzhou Gansu 730000 China department of Modern chemistry University of Science and Technology of China Hefei Anhui 230026 China [*]Address correspondence to this author at university of Science and Technology of china.

A facile method for the title transformation is described. The reaction of 2,2,6,6-tetramethyl-4-methoxypiperidine oxoammonium chloride (1b) and ketones bearing a-methylene group in acetonitrile proceeded smoothly to give the a-oxyfunctionalized coupling products (6a-h). These coupling products decomposed upon heating in acidic medium to produce a-diketones (7a-h) in good to excellent yields.

关键词： Piperidine oxoammonium salt monoketones,α-diketones synthesis

Regioselective Addition of Silyl Enolates to α, β-Unsaturated Aldehyde and its Acetal Catalyzed by MgI2 Etherate

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Chinese Chemical Letters 2003年第8期14卷 800-803页

作者： Xing Xian zhang, Wei Dong Z. LI* National laboratory of applied organic chemistry & Institute of organic chemistry, lanzhou university, lanzhou 730000 National Laboatory of applied organic chemistry & Institute of organic chemistry Lanzhou University Lanzhou 730000

Regioselective addition reactions of silyl enolates to a, b-unsaturated aldehyde and its acetal catalyzed by MgI2 etherate give aldol adducts (1, 2-addition) preferentially over Michael adducts (1, 4-addition). This unique regioselectivity is distinctly different with other Lewis acidic promoters and may be attributed to the high oxyphilicity of IMg+.

关键词： MgI2 etherate silyl enolate addition regioselective.

A FACILE TOTAL SYNTHESIS OF 6-PENTYL-α-PYRONE

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Chinese Chemical Letters 1996年第4期7卷 317-318页

作者： Chi zhang Xue Chao WANG Fang Ning zhang and Xin Fu PAN(department of chemistry, State Key laboratory of applied organic chemistry lanzhou university, lanzhou 730000 ) lanzhou UNIV STATE KEY LAB APPL ORGAN CHEMDEPT CHEMLANZHOU 730000PEOPLES R CHINA

A facile total synthesis of 6-pentyl-α-pyrone 1 has been *** key step is the treatment of 2-furyl-pentyl-csrbinol 3 with NBS in aqueous tetrahydrofuran(THF).The overall yield is 34%.

关键词： TOTAL A FACILE TOTAL SYNTHESIS OF 6-PENTYL PYRONE

Total Synthesis of (±)-Nimbonone and (±)-12-Ethyl-13-methoxy- 8,11,13-podocarpatriene

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Chinese Chemical Letters 2002年第10期13卷 935-936页

作者： Cheng Lu zhang, Ping Yan BIE, Xuan Jia PENG, Xin Fu PAN* department of chemistry, National laboratory of applied organic chemistry, lanzhou university, lanzhou 730000 department of chemistry National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China

A facile total synthetic route to (±)-nimbonone and (±)-12-ethyl-13-methoxy- 8,11,13-podocarpatriene was developed. The Wittig reaction of cyclocitral with (3-methoxy- benzyl) triphenylphosphonium and intramolecular cyclization with BF3Et2O in the synthetic progress were applied. In order to induce the ethyl substituent, Fiedel-Crafts acetylation and then decarbonylation had been employed.

关键词： Total synthesis (±)-nimbonone diterpene.