22844-33-3Relevant academic research and scientific papers
Mild synthesis of mesoporous silica supported ruthenium nanoparticles as heterogeneous catalysts in oxidative Wittig coupling reactions
Carrillo, Adela I.,Schmidt, Luciana C.,Marin, M. Luisa,Scaiano, Juan C.
supporting information, p. 435 - 440 (2014/02/14)
A new efficient approach for the in situ synthesis of anchored ruthenium nanoparticles (RuNP) in three different kinds of mesoporous silica materials, MCM-41, SBA-15 and HMS, has been developed. Solids have been synthesized under very mild conditions from RuCl3·H2O salt reduced in one hour at room temperature in the mesoporous silicas previously grafted with aminopropyltriethoxysilane (APTES). Well-dispersed ruthenium nanoparticles, with an average size of 3 nm, anchored into the silica network by the APTES were obtained. These materials, with a molar ratio of Si/Ru = 40, were found to be catalytically active and selective in the alcohol oxidation-Wittig olefination. Interestingly, while the reaction occurs from the alcohol, control experiments suggest that the aldehyde (the common Wittig substrate) is not involved. The Royal Society of Chemistry.
Ce0.98Pd0.02O2-δ: Recyclable, ligand free palladium(II) catalyst for Heck reaction
Sanjaykumar,Mukri, Bhaskar Devu,Patil, Satish,Madras, Giridhar,Hegde
experimental part, p. 47 - 54 (2012/02/05)
Palladium substituted in cerium dioxide in the form of a solid solution, Ce0.98Pd0.02O1.98 is a new heterogeneous catalyst which exhibits high activity and 100% trans-selectivity for the Heck reactions of aryl bromides including heteroaryls with olefins. The catalytic reactions work without any ligand. Nanocrystalline Ce0.98Pd 0.02O1.98 is prepared by solution combustion method and Pd is in +2 state. The catalyst can be separated, recovered and reused without significant loss in activity. Indian Academy of Sciences.
SIP3 RECEPTOR ANTAGONIST
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Page/Page column 21, (2010/02/14)
PROBLEM TO BE SOLVED: To obtain a compound having selective SIP3 receptor antagonism and a medicine containing the same. SOLUTION: The medicine comprises an aminopropionic acid derivative represented by general formula (1) (R1 is a hydrogen atom or a lower alkyl group; R2 is formula A; A is CO or CH2; E is an oxygen atom or an NR4; R3 is a lower alkyl group or formula B; G is CH, a nitrogen atom or a phosphorus atom; J is an oxygen atom or a sulfur atom; R4 is a hydrogen atom or a lower alkyl group; R5, R6 and R7 are each the same or different and a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group or a haloalkyl group; m is an integer of 1-8; n is an integer of 1-5) or its pharmaceutically permissible salt as an active ingredient.
A practical synthesis of N-p-Anisyl-N-Methyl-Amino-3-(9-anthryl)- propane: An exciplex fluorescence 'thermometer'
Spivey, Alan C.,Bissell, Andrew J.,Stammen, Blanda
, p. 623 - 632 (2007/10/03)
A practical synthesis of N-p-Anisyl-N-Methyl-Amino-3-(9-Anthryl)propane from 9-anthraldehyde is described. All the intermediates in this simple five step sequence are crystalline and simple re-crystallisation after each step allows the preparation of this
Wavelength Dependent Trans to Cis and Quantum Chain Isomerizations of Anthrylethylene Derivatives
Gopal, V. Raj,Reddy, A. Mahipal,Rao, V. Jayathirtha
, p. 7966 - 7973 (2007/10/03)
Anthrylethylene derivatives 1-4 were synthesized to study their photoisomerization.Interestingly 1 and 2 displayed wavelength dependent trans to cis photoisomerization, whose origin is due to preferential light absorption and excitation of the trans isomer.Triplet sensitization studies revealed that these anthrylethylenes undergo only cis to trans isomerization and not trans to cis isomerization.UV-vis absorption, fluorescence emission, and fluorescence quantum yields were determined for all anthrylethylenes.Dual fluorescence is observed for 1, 2, and cis-1, indicating two different emissive states.The fluorescence solvatochromism displayed by 1, 2, and cis-1 is a clear indication of the involvement of a charge transfer excited state.The quantum yield of isomerization was determined in various solvents and also as a function of concentration.We report here the first "quantum chain isomerization" that originates from a singlet excited state.The rationale put forward for the observed quantum chain isomerization process is the involvement of adiabatic isomerization from the singlet excited state and subsequent energy transfer to a ground state molecule.
