Ultrasound-promoted carbonyl allylation by allylic alcohols with palladium–tin dichloride in nonpolar solvents: inversed regiocontrol of carbonyl allylation in polar solvents

1992 ◽  
pp. 1102-1103 ◽  
Author(s):  
Yoshiro Masuyama ◽  
Akiko Hayakawa ◽  
Yasuhiko Kurusu
Keyword(s):  
Allylic Alcohols ◽  
Polar Solvents ◽  
Nonpolar Solvents ◽  
Carbonyl Allylation

Ultrasound-promoted palladium-catalyzed carbonyl allylation by allylic alcohols with tin(II) chloride in non-polar solvents

1994 ◽  
Vol 220 (1-2) ◽  
pp. 155-159 ◽  
Author(s):  
Yoshiro Masuyama ◽  
Akiko Hayakawa ◽  
Masayuki Kishida ◽  
Yasuhiko Kurusu
Keyword(s):  
Allylic Alcohols ◽  
Polar Solvents ◽  
Palladium Catalyzed ◽  
Carbonyl Allylation

scholarly journals Regeneration of Spent Lubricant Refining Clays by Solvent Extraction

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Yan-zhen Wang ◽  
Hai-long Xu ◽  
Li Gao ◽  
Meng-meng Yan ◽  
Hong-ling Duan ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Petroleum Ether ◽  
Oil Recovery ◽  
Oil Refining ◽  
Lubricating Oil ◽  
Polar Solvents ◽  
Base Oil ◽  
Nonpolar Solvents ◽  
Total Oil ◽  
Storage Times

Step-by-step solvent extraction was used to regenerate spent clay by recovering the adsorbed oil in lubricating oil refining clay. Several polar and nonpolar solvents were tested, and petroleum ether (90–120°C) and ethanol (95 v%) were selected as the nonpolar and polar solvents, respectively. The spent clay was first extracted using petroleum ether (90–120°C) to obtain ideal oil and then extracted with a mixed solvent of petroleum ether (90–120°C) and ethanol (95 v%) two or three times to obtain nonideal oil before being extracted with ethanol and water. Finally, the clay was dried at 130°C to obtain regenerated clay. The total oil recovery can be more than 99 wt% of the adsorbed oil. The recovered ideal oil can be used as lubricating base oil. Shorter storage times for spent clay produce better regeneration results. The regenerated clay can be reused to refine the lubricating base oils.

Liquefaction Properties of Alanine Hydrosulfate Ionic Liquid on Pine

2014 ◽  
Vol 525 ◽  
pp. 177-180
Author(s):  
Jian Hua Huang ◽  
Hong Lu Xie ◽  
Guo Feng Zou
Keyword(s):  
Ionic Liquid ◽  
Fourier Transform ◽  
Sulfuric Acid ◽  
Orthogonal Experiment ◽  
Hydrogen Sulfate ◽  
Mass Ratio ◽  
Polar Solvents ◽  
Orthogonal Experiment Design ◽  
Nonpolar Solvents ◽  
Strong Acidity

Ionic liquid containing alanine cations and hydrogen sulfate was synthesized using alanine and sulfuric acid as materials. Fourier Transform Infrared Specctrometer was used to verify the final product. The results showed that the objective product was developed successfully. General properties of the final product were detected. The results showed that strong acidity, large viscosity, soluble in polar solvents and insoluble in nonpolar solvents were the products properties which were suitable for liquefying. The liquefaction rate of ionic liquid on pine was studied. Study the optimum liquefaction condition using the method of orthogonal experiment design. By stirring at 120°C for 2 hours using ionic liquid with the concentration of 80% and with the mass ratio of 30, liquefaction rate of ionic liquid on pine was high.

Palladium-Catalyzed Carbonyl Allylation of Diketo Compounds by Allylic Alcohols with SnCl2

1989 ◽  
Vol 18 (9) ◽  
pp. 1647-1650 ◽  
Author(s):  
Yoshiro Masuyama ◽  
Tomoyoshi Tsunoda ◽  
Yasuhiko Kurusu
Keyword(s):  
Allylic Alcohols ◽  
Palladium Catalyzed ◽  
Carbonyl Allylation

scholarly journals Isomerization and Properties of Isomers of Carbocyanine Dyes

Sci ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 5 ◽  
Author(s):  
Pavel Pronkin ◽  
Alexander Tatikolov
Keyword(s):  
Phenyl Ring ◽  
Steric Effect ◽  
Cyanine Dyes ◽  
Information Storage ◽  
Polymethine Chain ◽  
Trans Isomers ◽  
Trans Form ◽  
Polar Solvents ◽  
Carbocyanine Dyes ◽  
Nonpolar Solvents

One of the important features of polymethine (cyanine) dyes is isomerization around one of C–C bonds of the polymethine chain. In this review, spectral properties of the isomers, photoisomerization and thermal back isomerization of carbocyanine dyes, mostly meso-substituted carbocyanine dyes, are considered. meso-Alkyl-substituted thiacarbocyanine dyes are present in polar solvents mainly as cis isomers and, hence, exhibit no photoisomerization, whereas in nonpolar solvents, in which the dyes are in the trans form, photoisomerization takes place. In contrast, the meso-substituted dyes 3,3′-dimethyl-9-phenylthiacarbocyanine and 3,3′-diethyl-9-(2-hydroxy-4-methoxyphenyl)thiacarbocyanine occur as trans isomers and exhibit photoisomerization in both polar and nonpolar solvents. The behavior of these dyes may be explained by the fact that the phenyl ring of the substituent in their molecules can be twisted at some angle, removing the substituent from the plane of the molecule and reducing its steric effect on the conformation of the trans isomer. In some cases, photoisomerization of cis isomers of meso-substituted carbocyanine dyes is also observed (for some meso-alkyl-substituted dyes complexed with DNA and chondroitin-4-sulfate; for 3,3′-diethyl-9-methoxythiacarbocyanine in moderate polarity solvents). The cycle photoisomerization–thermal back isomerization of cyanine dyes can be used in various systems of information storage and deserves further investigation using modern research methods.

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