STUDIES ON THE TOTAL SYNTHESIS OF（－）－（2R，5S）－2－METHYL－5－HYDROXYMETHYL－δ－VALEROLACTONE

ＳＴＵＤＩＥＳ　ＯＮ　ＴＨＥ　ＴＯＴＡＬ　ＳＹＮＴＨＥＳＩＳ　ＯＦ（－）－（２Ｒ，５Ｓ）－２－ＭＥＴＨＹＬ－５－ＨＹＤＲＯＸＹＭＥＴＨＹＬ－δ－ＶＡＬＥＲＯＬＡＣＴＯＮＥＳＴＵＤＩＥＳＯＮＴＨＥＴＯＴＡＬＳＹＮＴＨＥＳＩＳＯＦ（－）－（２Ｒ，５Ｓ）－...     

PARAMAGNETIC AND DIAMAGNETIC DICOPPER（Ⅱ） COMPLEXES WITH DI－SCHIFF BASE DERIVED FROM 2－HYDROXY－1－NAPHTHALDEHYDE AND1，3－DIANINO－2－PROPANOL

ＰＡＲＡＭＡＧＮＥＴＩＣＡＮＤＤＩＡＭＡＧＮＥＴＩＣＤＩＣＯＰＰＥＲ（Ⅱ）ＣＯＭＰＬＥＸＥＳＷＩＴＨＤＩ－ＳＣＨＩＦＦＢＡＳＥＤＥＲＩＶＥＤＦＲＯＭ２－ＨＹＤＲＯＸＹ－１－ＮＡＰＨＴＨＡＬＤＥＨＹＤＥＡＮＤ１，３－ＤＩＡＮＩＮＯ－２－ＰＲＯＰＡＮＯＬ...     

STUDIES ON THE SYNTHESIS OF SINULARIOL－D， SINULARIOL－A AND SINULARIC ACID－A．－SYNTHESIS OF （5R）－7，7－DIMETHOXY－5－［1－（2－TERT－BUTYLDIPHENYLSILOXYMETHYL）VINYL］－2－HEPTANONE

ＳＴＵＤＩＥＳＯＮＴＨＥＳＹＮＴＨＥＳＩＳＯＦＳＩＮＵＬＡＲＩＯＬ－Ｄ，ＳＩＮＵＬＡＲＩＯＬ－ＡＡＮＤＳＩＮＵＬＡＲＩＣＡＣＩＤ－Ａ．－ＳＹＮＴＨＥＳＩＳＯＦ（５Ｒ）－７，７－ＤＩＭＥＴＨＯＸＹ－５－［１－（２－ＴＥＲＴ－ＢＵＴＹＬＤＩＰＨＥＮＹＬＳ...     

IN－SITU FTIR AND UV－VISIBLE－NEAR－IR SPECTROELECTROOHEMICAL STUDIES OF MIXED－VALENCE ISOPOLYANION Mo＿6O＿（19）￣（3－） IN APROTIC MEDIA

ＩＮ－ＳＩＴＵ　ＦＴＩＲ　ＡＮＤ　ＵＶ－ＶＩＳＩＢＬＥ－ＮＥＡＲ－ＩＲ　ＳＰＥＣＴＲＯＥＬＥＣＴＲＯＯＨＥＭＩＣＡＬ　ＳＴＵＤＩＥＳ　ＯＦ　ＭＩＸＥＤ－ＶＡＬＥＮＣＥ　ＩＳＯＰＯＬＹＡＮＩＯＮ　Ｍｏ＿６Ｏ＿（１９）￣（３－）　ＩＮ　ＡＰＲＯＴＩＣ　Ｍ...     

SYNTHESIS OF 4－S－（1＂－ARYL－TETRAZOLE－5＂－YL）－4－DEOXY－4＇－DEMETHYL－EPIPODOPHYLLOTOXIN ANALOGUES

ＳＹＮＴＨＥＳＩＳ ＯＦ ４－Ｓ－（１＂－ＡＲＹＬ－ＴＥＴＲＡＺＯＬＥ－５＂－ＹＬ）－４－ＤＥＯＸＹ－４＇－ＤＥＭＥＴＨＹＬ－ＥＰＩＰＯＤＯＰＨＹＬＬＯＴＯＸＩＮ ＡＮＡＬＯＧＵＥＳ￥ＫｕａｎＫｅＬＵ；ＦａｎｇＭｉｎＬＩＵａｎｄＹａｏＺｕＣＨＥＮ（Ｄ...     

PRACTICAL METHOD FOR SYNTHESIS OF NEW GLYCOLIPIDS N－［4（DIALKYL－L－GLUTAMATECARBONYLETHYLCARBO－NYLAMINO）BUTYL］LACTOBIONAMIDES

ＰＲＡＣＴＩＣＡＬＭＥＴＨＯＤＦＯＲＳＹＮＴＨＥＳＩＳＯＦＮＥＷＧＬＹＣＯＬＩＰＩＤＳＮ－［４（ＤＩＡＬＫＹＬ－Ｌ－ＧＬＵＴＡＭＡＴＥＣＡＲＢＯＮＹＬＥＴＨＹＬＣＡＲＢＯ－ＮＹＬＡＭＩＮＯ）ＢＵＴＹＬ］ＬＡＣＴＯＢＩＯＮＡＭＩＤＥＳ￥ＺｈｏｎｇＺｈｉ...     

（E）－β，γ－UNSATURATED NITRILES FROM DIMETHYLSULFONIUM CYANOMETHYLIDE AND 9－ALKENYL－9－BORABICYCLO［3，3，1］NONANES

（Ｅ）－β，γ－ＵＮＳＡＴＵＲＡＴＥＤＮＩＴＲＩＬＥＳＦＲＯＭＤＩＭＥＴＨＹＬＳＵＬＦＯＮＩＵＭＣＹＡＮＯＭＥＴＨＹＬＩＤＥＡＮＤ９－ＡＬＫＥＮＹＬ－９－ＢＯＲＡＢＩＣＹＣＬＯ［３，３，１］ＮＯＮＡＮＥＳＮａｎＳｈｅｎｇＬＩ；ＭｉｎＺｈｉＤＥＮＧ；Ｙ...     

SYNTHESIS OF DI－（2＇－DEOXY－2＇－FLUORO）PYRIMIDINENUCLEOSIDE PHOSPHATES AND PHOSPHOROTIOATES

ＳＹＮＴＨＥＳＩＳＯＦＤＩ－（２＇－ＤＥＯＸＹ－２＇－ＦＬＵＯＲＯ）ＰＹＲＩＭＩＤＩＮＥＮＵＣＬＥＯＳＩＤＥＰＨＯＳＰＨＡＴＥＳＡＮＤＰＨＯＳＰＨＯＲＯＴＩＯＡＴＥＳＺｈｅｎｇＦｕＷＡＮＧ；ＹｉＢｉｎｇＺＨＡＮＧ；ＹａｏＱｕａｎＣＨＥＮ（Ｌａｂｏｒａ...     

6－0－DEMETHYL－（19S）－DIHYDROETORPHINE， A NEW SYNTHETIC COMPOUND， ISOLATED FROM CRUDE DIHYDROETORPHINE AS A MINOR BY－PRODUCT

６－０－ＤＥＭＥＴＨＹＬ－（１９Ｓ）－ＤＩＨＹＤＲＯＥＴＯＲＰＨＩＮＥ，　Ａ　ＮＥＷ　ＳＹＮＴＨＥＴＩＣ　ＣＯＭＰＯＵＮＤ，　ＩＳＯＬＡＴＥＤ　ＦＲＯＭ　ＣＲＵＤＥ　ＤＩＨＹＤＲＯＥＴＯＲＰＨＩＮＥ　ＡＳ　Ａ　ＭＩＮＯＲ　ＢＹ－ＰＲＯＤＵＣＴ６－０－...     

SYNTHESIS OF 4－S－（4＂，5＂－DIARYL－1＂，2＂，4＂－TRIAZOLE－3＂－YL）－4－DEOXY－4＇－DEMETHYL－EPIPODOPHYLLOTOXIN ANALOGUES

ＳＹＮＴＨＥＳＩＳ ＯＦ ４－Ｓ－（４＂，５＂－ＤＩＡＲＹＬ－１＂，２＂，４＂－ＴＲＩＡＺＯＬＥ－３＂－ＹＬ）－４－ＤＥＯＸＹ－４＇－ＤＥＭＥＴＨＹＬ－ＥＰＩＰＯＤＯＰＨＹＬＬＯＴＯＸＩＮ ＡＮＡＬＯＧＵＥＳ￥ＦａｎｇＭｉｎＬＩＵ；ＫｕａｎＫｅＬＵ；...     

Neutral diterpenoids of oleoresins of five species of conifers of Transcarpathia

The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 812–816, November–December, 1988.     

利用手持技术改进测定乙醇分子结构实验

利用压强传感器代替排水集气法,改进测定乙醇分子结构实验的仪器装置,并探索最佳反应条件。另外,设计两个空白实验,结合压强变化曲线对实验误差进行相关讨论。     

光谱仪测试范围的扩展

由于石化行业的生产需要，其材质的使用具有多样性和广泛性，经常会出现顾客委托的测试样品的一个或几个元素跨越光谱仪现有测试程序测量范围的情况。本法通过对光谱仪测试原理的认识，根据光谱仪的测试能力及标样的采集，实现了一个或几个元素测量范围的扩展，并对其测量的影响因素进行了研究。     

Effect of the Method of Modification of Zeolite X on Selectivity of Catalytic Methylation of Toluene

Theoretical and Experimental Chemistry - The effect of the method of modification of catalysts based on zeolite X by cesium and magnesium cations (ion exchange and impregnation) on the selectivity...     

Influence of viscosity of medium on processes of oxygen quenching of excited states of mesoporphyrin

The oxygen quenching rate constants for singlet and triplet excited states of the dimethyl ester of mesoporphyrin IX increase with decreasing viscosity of the medium and reach a maximum at a viscosity of approximately 0.4 mPa·sec, after which the rate constants begin to decrease. The drop in rate constant with increasing fluidity of the medium may be related to a nonequilibrium character of the elementary act in the interaction of the reactants in the solvent cage. In viscous media such as isopropyl alcohol, isobutyl alcohol, and isoamyl alcohol, the reaction radius is greater than the sum of the radii of the reacting particles. The long-range character of these processes is due to the relatively weak dependence of the quenching probability on distance.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 2, pp. 161–167, March–April, 1989.     

Dichroism of absorption and polarization of phosphorescence of molecules of the closed form of nitrobenzospirothiopyran

The spectral-polarization characteristics of absorption and phosphorescence of molecules of the initial form of nitro-substituted indolinospirobenzothiopyran were studied in oriented polyethylene films and in solutions with different polarity. An oscillator model of the electron transitions responsible for the formation of absorption and luminescence spectra was suggested. It was established that the principal differences in the spectral and photophysical properties of the compound studied and its oxygen-containing analog are associated with the fact that the electronegativity of the S atom is lower than that of the O atom. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1143–1146, June, 1997.     

Synthesis of tetrabenzoporphins of the basis of isoindoline

Chemistry of Heterocyclic Compounds -