Zobrazeno 1 - 10
of 193
pro vyhledávání: '"Hiroshi Kakisawa"'
Autor:
Hiroshi, Kakisawa
Publikováno v:
研究紀要 = Bulletin of Tsukuba International University. 3:31-41
The chemical structure of ptilomicalin, an antiviral alkaloid obtained from a marine sponge, and of quartromicins, antibiotic nonalkaloids from a fungous metaborite, has been determined on the bases of chemical and spectroscopic analyses. The alkaloi
Autor:
Hiroshi Kakisawa, Tamotsu Furumai, Toshikazu Oki, Masahisa Oka, Seiji Iimura, Qi Gao, Masataka Konishi, Yukio Narita
Publikováno v:
The Journal of Organic Chemistry. 58:1875-1881
The absolute configuration of terpestacin (1), a fungal metabolite with syncytium formation inhibitory activity, was determined by means of NMR technique and X-ray single-crystal analysis. Its biosynthetic pathway was elucidated by the incorporation
Autor:
Seiji Iimura, Masahisa Oka, Hiroshi Kakisawa, Yukio Narita, Toshikazu Oki, Masataka Konishi, Qi Gao
Publikováno v:
Tetrahedron Letters. 34:493-496
Terpestacin a novel syncytium formation inhibitor in HIV infection, was isolated from Arthrinium sp. metabolites. The structure of terpestacin including the absolute stereochemistry was determined on the basis of spectroscopic analysis and chemical r
Publikováno v:
ChemInform. 22
The 1,3-dipolar cycloaddition of nitrile oxides to 2-X-bicyclo[2.2.2]oct-5-enes (X=O, NMe, S, SO2) were investigated together with acyclic and alicyclic analogues. The regioselectivity in an exo-attack was controlled by the heteroatom present at an a
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 22
Autor:
Takenori Kusumi, Hiroshi Kakisawa, Yoshinobu Inouye, Ginda Haro, Masahito Mori, Midori O. Ishitsuka
Publikováno v:
ChemInform. 23
New types of a bisnorditerpenoid and a norditerpenoid possessing a benzotropolonoid and a tropolonoid moieties, salviolone (8) and miltipolone (15), respectively, have been isolated and their structures were determined by spectroscopic methods. The s
Publikováno v:
ChemInform. 23
Application of the modified Mosher's method to the N -MTPA derivatives of several amino acid esters and acyclic amines indicates that this method may be generally used to determine the absolute configurations of the α-carbons of amino compounds of l
Publikováno v:
ChemInform. 24
(3R,4R)-5-(4-Alkenyl)-3,4-bis(benzyloxy)-5-hydroxy-1-methyl-2-pyrrolidinones were cyclized with formic acid to give chiral carbocycles. The 6-membered carbocycle was predominantly formed from (E)-4-alkenyl, while the 5-membered carbocycle was formed
Publikováno v:
Journal of the American Chemical Society. 114:8472-8479
The structure of ptilomycalin A (1), a marine alkaloid possessing potent antiviral and antibiotic activites, has been determined on the basis of NMR analyses of its trifluoroacetyl (TFA) derivative (2). It has a unique structure consisting of a polyc