70969-99-2Relevant articles and documents
Oxacycle synthesis via intramolecular reaction of carbanions and peroxides
Willand-Charnley, Rachel,Puffer, Benjamin W.,Dussault, Patrick H.
supporting information, p. 5821 - 5823 (2014/05/20)
The intramolecular reaction of dialkyl peroxides with carbanions, generated via chemoselective metal-heteroatom exchange or deprotonation, provides a new approach to cyclic ethers. Applied in tandem with C-C bond formation, the strategy enables a one-step annelation to form oxaospirocycles.
Studies on non-thiazolidinedione antidiabetic Agents. 2. Novel oxyiminoalkanoic acid derivatives as potent glucose and lipid lowering agents
Imoto, Hiroshi,Sugiyama, Yasuo,Kimura, Hiroyuki,Momose, Yu
, p. 138 - 151 (2007/10/03)
We previously reported that (Z)-2-{4-[(5-methyl-2-phenyl-1,3-oxazol-4-yl) methoxy]benzyloxyimino}-2-(4-phenoxyphenyl)acetic acid (3) showed potent glucose and lipid lowering effects in genetically obese and diabetic mice, KKA y. This compound a
Oxyiminoalkanoic acid derivatives with hypoglycemic and hypolipidemic activity
-
, (2008/06/13)
This invention provides a novel oxyiminoalkanoic acid derivative which has excellent hypoglycemic and hypolipidemic actions and which is used for the treatment of diabetes mellitus, hyperlipemia, insulin insensitivity, insulin resistance and impaired glucose tolerance.
Photochemistry of nonconjugated diketones: internal self-quenching and energy transfer
Wagner, Peter J.,Frerking, Harlan W. Jr.
, p. 2047 - 2061 (2007/10/03)
The triplet state behavior of nine α,ο-dibenzoylalkanes indicates the occurrence of a rapid quenching interaction between the two carbonyl groups.This quenching is fastest (k=3E7 s-1) in dibenzoylbutane, is slightly slower (ca.E7 s-1) in dibenzoylethane, dibenzoylpentane, and 2,2-dibenzoylpropane, but is absent in 1,3-dibenzoylpropane.It also occurs in several "mixed" 1,4-diaroylbutanes incorporating p-ethylbenzoyl or p-methoxybenzoyl chromophores.This internal self-quenching is interpreted as the intramolecular counterpart of the well-know bimolecular self-quenching of aryl ketones, although no exact mechanism can be proposed.Such internal quenching does not occur as rapidly, if at all, in three "turned around" diketones: δ-(p-acetylphenyl)valerophenone, δ-(p-acetylphenoxy)valerophenone, and γ-(p-acetylphenoxy)butyrophenone.This fact, together with the varying rates of internal self-quenching in the dibenzoylalkanes, indicates the necessity for a very specific and close orientation of the two carbonyl groups for self-quenching.In the mixed diketones containing a p-alkylbenzoyl group, triplet excitation appears to be fully equilibrated between the two chromophores.However, in those containing a p-methoxybenzoyl group, excitation does not fully equilibrate before triplet decay, as evidenced by different quenching efficiencies for products from the two carbonyls.Analysis indicates intramolecular energy transfer rate constants -1.These are sufficiently lower than in other bichromophoric systems to suggest relatively slow energy hopping in the polymers of phenyl vinyl ketone.Key words: nonconjugated diketones, dibenzoylalkanes, sefl-quenching, energy transfer, triplet ketones.
Synthesis of Nitriles from Haloesters, Haloketones and Haloethers
Talekar, D. G.,Joshi, P. L.,Ramaiah, P.,Rao, A. S.
, p. 145 - 151 (2007/10/02)
The action of NaCN on haloesters, haloketones and haloethers has been studied.Haloesters wherein halogen and ester functions are located on adjacent carbon atoms, do not furnish the corresponding nitriles, whereas those with halogen and ester functions not located on adjacent carbon atoms, furnish the corresponding nitriles in good yields.The presence of hydroxy or ether function on the carbon adjacent to primary halide bearing carbon atom does not interfere in the reaction with cyanide. δ-Haloketones are transformed to ketonitriles, γ-Haloketones are transformed to cyclopropyl ketones and epoxyhalides to epoxynitriles.