Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Tamura A"'
Publikováno v:
ChemInform. 46
The total hydrodeoxygenation of carbohydrate-derived molecules to alkanes, a key reaction in the production of biofuel, was reviewed from the aspect of catalysis. Noble metals (or Ni) and acid are the main components of the catalysts, and group 6 or
Publikováno v:
ChemInform. 44
CeO2 acted as an efficient and reusable heterogeneous catalyst for transesterification of esters with alcohols under the solvent-free conditions at 160 °C. Among the 11 kinds of metal oxides, CeO2 is the most suitable catalyst in terms of catalytic
Publikováno v:
ChemInform. 23
The reaction of homophthalic anhydride (1) and aldehydes in the presence of a strong base was studied. Reaction of 1 and benzaldehyde in the presence of NaH in anhydrous tetrahydrofuran (THF) at low temperature (0°C-room temperature) followed by tre
Publikováno v:
ChemInform. 25
Ethyl acetate was perfluorinated by direct fluorination in the presence of cesium fluoride, affording pentafluoroethyl trifluoroacetate in excellent yield. In the reaction pathway, the dimerization of trifluoroacetyl fluoride with cesium fluoride giv
Publikováno v:
ChemInform. 25
The piperidine alkaloid (–)-allosedamine (1) has been synthesized, in 21% overall yield, in nine steps starting from the formyl-ester 4. The synthesis features the reaction cascade 7 3 2, involving asymmetric electrophilic enolate hydroxyamination,
Publikováno v:
ChemInform. 25
A number of 2-(polyfluoroalkyl)-thiochromones ( 4 ) and -chromones ( 5 ) have been synthesized in good to excellent yield by an intramolecular Friedel-Crafts acylation of the Z isomers of 3-(arylthio)- ( 2 ) and 3-(aryloxy)polyfluoro-2-alkenoic acids
Autor:
Masafumi Kaneko, Tominori Kimura, K. Fujiwara, Nobutoshi Murakami, Satoru Tamura, Nobuhiro Shimizu
Publikováno v:
ChemInform. 41
A synthetic pathway to 5,6-dihydrovaltrate (I) is described using an asymmetric Diels—Alder reaction between diethyl fumarate and cyclopentadiene as key step (catalyst and product configuration are not specified, yield quant., 95% e.e.).
Publikováno v:
ChemInform. 28
A new method for the synthesis of enantiomerically enriched cyclohexadienone spiroisoxazoline (-)-2a has been described. Asymmetric intramolecular oxidative cyclization of the o-phenolic oxime-ester 1c using a novel optically active tertiary alcohol
Publikováno v:
ChemInform. 31
The reaction of N-silyl-1-aza-allyl anions with trifluoroacetylketene diethyl ketal and (E)-1,1,1-trifluoro-4-phenylbut-3-en-2-one are described. The anions, which were prepared from an α-silyl carbanion of 3-methyl-5-(trimethylsilylmethyl)isoxazole
Publikováno v:
ChemInform. 33
Reaction of 1,2-dichloro-1,1,2-trifluoro-2-methoxyethane with anhydrous hydrogen fluoride (AHF) was investigated in the presence of metal fluorides supported on porous aluminum fluoride (PAF). 2-Chloro-1,1,2,2-tetrafluoro-2-methoxyethane, a new compo