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pro vyhledávání: '"Tamura A"'
Publikováno v:
ChemInform. 47
The developed method offers an alternative access to β-cyanohydrins and β-amino nitriles from 1,1-disubstituted propargyl alcohols and amines, respectively.
Publikováno v:
ChemInform. 45
Rh-MoOx/SiO2 is an effective heterogeneous catalyst for selective hydrogenation of amino acids to amino alcohols in a water solvent. MoOx modification of Rh drastically enhanced the activity and improved the selectivity and ee. Various amino alcohols
Publikováno v:
ChemInform. 47
Selective oxidation of α,β-unsaturated aldehydes to α,β-unsaturated carboxylic acids was performed using O2 as the oxidant in the presence of a simple iron catalyst. The addition of an alkali metal...
Publikováno v:
ChemInform. 47
A three-dimensionally well-ordered NASICON-type Mg 2+ cation conductor, (Mg x Hf 1− x ) 4/(4−2 x ) Nb(PO 4 ) 3 , was firstly developed by partial substitution of lower valent Mg 2+ cation onto the Hf 4+ sites in a HfNb(PO 4 ) 3 solid to realize h
Publikováno v:
ChemInform. 47
Transformation of the cyclobutenone products via thermal ring opening and oxidative cleavage of the silicon substituent is exemplified.
Autor:
Yuji Narikiyo, Mayuka Harada, Tomonori Tsunokake, Shintaro Ban, Yoshimitsu Hashimoto, Osamu Tamura, Yuta Saito, Tatsuyuki Tachibana, Nobuyoshi Morita, Iwao Okamoto
Publikováno v:
ChemInform. 47
Depending on the catalyst propargylic alcohols (I) undergo either Meyer—Schuster rearrangement followed by aza-Michael addition to give piperidines (II) or undergo direct cyclization to form alkynylated piperidines (III).
Publikováno v:
ChemInform. 47
The two-step synthesis of the substrates via Suzuki-coupling of the corresponding 1,2-dibromobenzene with N-Boc-pyrrole-2-boronic acid and subsequent N-deprotection is described.
Autor:
Yoshimitsu Hashimoto, Nobuyoshi Morita, Arisa Yasuda, Iwao Okamoto, Shintaro Ban, Osamu Tamura, Motohiro Shibata
Publikováno v:
ChemInform. 46
Two types of cyclic ethers are obtained from propargylic alcohols by gold(I)/(III)-catalyzed regiodivergent syntheses.
Autor:
Kenji Fukui, Osamu Tamura, Shintaro Ban, Iwao Okamoto, Nobuyoshi Morita, Asuka Miyazawa, Isao Azumaya, Yoshimitsu Hashimoto, Rina Kono, Hyuma Masu
Publikováno v:
ChemInform. 46
O-Silyloxime (I) reacts with alkenes (II) and Boc2O to the Boc-protected isoxazolidin-3-carboxamides (IV) and (V) favouring the cis-isomer (IV).
Publikováno v:
ChemInform. 46
An efficient catalytic system is developed for the Mannich-type reaction of imines (I) with benzyl isocyanide.