- Palladium-Promoted Neutral 1,4-Brook Rearrangement/Intramolecular Allylic Cyclization Cascade Reaction: A Strategy for the Construction of Vinyl Cyclobutanols
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A cascade reaction to build vinyl cyclobutanol rings through activation of vinyl epoxides by palladium, followed by 1,4-Brook rearrangement and intramolecular cyclization with a palladium complex of the resulting carbon anion, is described. Through this cascade reaction, several highly substituted cyclobutanol substrates were achieved in good yields with high stereoselectivities.
- Zhang, Hao,Ma, Shiqiang,Yuan, Ziyun,Chen, Peng,Xie, Xingang,Wang, Xiaolei,She, Xuegong
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supporting information
p. 3478 - 3481
(2017/07/15)
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- MICROORGANISMS FOR PRODUCING 4C-5C COMPOUNDS WITH UNSATURATION AND METHODS RELATED THERETO
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The invention provides a non-naturally occurring microbial organism having a butadiene, crotyl alcohol, 2,4-pentadienoate, 3-buten-2-ol, or 3-buten-1-ol, pathway. The microbial organism contains at least one exogenous nucleic acid encoding an enzyme in a pathway. The invention additionally provides a method for producing butadiene, crotyl alcohol, 2,4-pentadienoate, 3-buten-2-ol, or 3-buten-1-ol,. The method can include culturing a butadiene, crotyl alcohol, 2,4-pentadienoate, 3-buten-2-ol, or 3-buten-1-ol-producing microbial organism, where the microbial organism expresses at least one exogenous nucleic acid encoding a pathway enzyme in a sufficient amount, and under conditions and for a sufficient period of time to produce butadiene, crotyl alcohol, 2,4-pentadienoate, 3-buten-2-ol, or 3-buten-1-ol.
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Paragraph 0014; 00100
(2016/01/25)
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- SBA-15 supported Fe, Ni, Fe-Ni bimetallic catalysts for wet oxidation of bisphenol-A
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Bisphenol A is considered as pollutant, because it is toxic and hazardous to living organisms even at very low concentrations. Biological oxidation used for removing this organic from waste water is not suitable and consequently application of catalytic wet oxidation has been considered as one of the best options for treating bisphenol A. We have developed Fe/SBA-15, Ni/SBA-15 and Fe-Ni/SBA-15 as heterogeneous catalysts using the advanced impregnation method for oxidation of bisphenol A in water. The catalysts were characterized with physico-chemical characterization methods such as, powder X-ray diffraction (PXRD), FT-IR measurements, N2 adsorption-desorption isotherm, thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and inductively coupled plasma optical emission spectroscopy (ICPOES) analysis. This work illustrates activity of the catalysts for heterogeneous catalytic degradation reaction revealed with excellent conversion and recyclability. The degradation products identified were not persistent pollutants. GC-MS analysis identified the products: 2,4-hexadienedioic acid, 2,4-pentadienic acid and isopropanol or acetic acid. The leachability study indicated that the catalysts release very little metals to water. Therefore, the possibility of water contamination through metal leaching was almost negligible.
- Mayani, Suranjana V.,Mayani, Vishal J.,Kim, Sang Wook
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p. 3535 - 3541
(2015/02/19)
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- INTRAMOLECULAR DIELS-ALDER REACTION OF THIOALDEHYDES
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Intramolecular Diels-Alder reaction of thioaldehydes which were generated from bis(trimethylsilyl)sulfide and dienals gave the corresponding bicyclic adducts.
- Segi, Masahito,Takahashi, Mamoru,Nakajima, Tadashi,Suga, Sohei,Sonoda, Noboru
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p. 2431 - 2440
(2007/10/02)
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- DIENCARBONSAEUREN AUS 1,3-DIENEN UND CO2 DURCH C-C-VERKNUEPFUNG AN NICKEL(0)
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(Lig)Ni0 systems react with 1,3-dienes in the presence of CO2 to give nickela carboxylates.The influence of ligands and temperature on the regioselectivity of the C-C bond formation is elucidated.In some cases the nickela carboxylates undergo reductive elimination under the influence of maleic anhydride, and the coupled diene/CO2 moiety rearranges to give the diene carboxylic acid.A possible reaction sequence is discussed.
- Hoberg, H.,Schaefer, D.,Oster, B. W.
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p. 313 - 320
(2007/10/02)
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