7560-48-7Relevant academic research and scientific papers
Synthetic and structural study of 4-phosphacyclohexanones and 3-aza-7-phosphabicyclo[3.3.1]nonan-9-ones
Zayya, Almas I.,Spencer, John L.
experimental part, p. 5109 - 5116 (2012/07/30)
The synthesis of bicyclic phosphorus-nitrogen (PN) compounds containing the rigid bicyclo[3.3.1]nonan-9-one framework was attempted using the Mannich condensation reaction of four different phosphorinanone classes with amines and aldehydes. Three different isomers of 4-tert-butyl-2,6-di(methoxycarbonyl)-3,5- bis(p-dimethylaminophenyl)-4-phosphacyclohexanone were obtained from the Michael addition reaction of tert-butylphosphine with 2,4-di(methoxycarbonyl)-1,5- bis(p-dimethylaminophenyl)penta-1,4-dien-3-one. The reaction of the all-equatorial isomer with methylamine and formaldehyde produced the bicyclic PN compound 7-tert-butyl-1,5-di(methoxycarbonyl)-6,8-bis(p-dimethylaminophenyl)-3- methyl-3-aza-7-phosphabicyclo[3.3.1]nonan-9-one. The identical Mannich reaction of the enol tautomer also yielded the same product, as well as the PN compound 4-tert-butyl-6-methoxycarbonyl-5-(p-dimethylaminophenyl)-2-methyl-2-aza-4- phosphacyclohexanone and the E/Z isomers of 3-(p-dimethylaminophenyl)methyl-2- propenoate. The newly synthesised 3-aza-7-phosphabicyclo[3.3.1]nonan-9-one PN compound adopts a chair-chair conformation both in solution and the solid state.
Water is an efficient medium for Wittig reactions employing stabilized ylides and aldehydes
Dambacher, Jesse,Zhao, Wen,El-Batta, Amer,Anness, Robert,Jiang, Changchun,Bergdahl, Mikael
, p. 4473 - 4477 (2007/10/03)
Water is demonstrated to be an excellent medium for the Wittig reaction employing stabilized ylides and aldehydes. Although the solubility in water appears to be an unimportant characteristic in achieving good chemical yields and E/Z-ratios, the rate of W
SYNTHESIS OF A TRIAD MOLECULAR SYSTEM CONTAINING THE PHOTOSENSITIZER MESOPORPHYRIN II AND A SECONDARY ELECTRON DONOR AND ACCEPTOR FOR MODELING THE PHOTOSYNTHESIS PROCESS
Borovkov, V. V.,Evstigneeva, R. P.,Gribkov, A. A.
, p. 296 - 302 (2007/10/03)
We describe methods for synthesis of a triad molecular system based on mesoporphyrin II with electron-donor and electron-acceptor moieties for modeling the primary stage of charge separation in photosynthesis, differing in the order of addition of the donor and the acceptor.Using fluorescent spectroscopy, we have demonstrated quenching-containing coppounds.Investigation of the triad and its zinc complex by kinetic fluorescent spectroscopy allowed us to determine the electron transfer rate constants for the triad and for its zinc complex.
