Zobrazeno 1 - 10
of 347
pro vyhledávání: '"Tamotsu Fujisawa"'
Autor:
Kazumasa Shindo, Yoshito Yamamoto, Tamotsu Fujisawa, Yasuko Togamura, Takeshi Shibuya, Yoshiro Tozawa, Seiji Nakao, Kiyoshi Hirano, Hirotake Miyaji, Hideto Mashiyama, Michinaga Nakamura
Publikováno v:
Grassland Science.
Radioactive cesium (Cs) concentration of vegetation and soil was monitored in grasslands in seven farms located at a distance ranging from 90 to 180 km from the Fukushima nuclear power plant during seven months following the reactor meltdown in March
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::001206d0944498febae52cbe59088d5e
https://doi.org/10.1111/grs.12044
https://doi.org/10.1111/grs.12044
Publikováno v:
Tetrahedron Letters. 40:1953-1956
The bakers' yeast reduction of trifluoroacetyl derivatives was examined in the presence of various esters of methanethiosulfonate. The yeast reduction of 4-bromo-4′-trifluoroacetylbiphenyl using the cyclohexylmethyl methanethiosulfonate resulted in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc419d4d01bcc5f5a8eda59fdf560992
https://doi.org/10.1016/s0040-4039(99)00052-0
https://doi.org/10.1016/s0040-4039(99)00052-0
Publikováno v:
Tetrahedron Letters. 39:9735-9738
A novel alkylating ring cleavage reaction of enantiomerically pure β-trichloromethyl-β-propiolactone as a chiral building block with organoaluminum compounds provided ring-opened products with a chiral trichloromethyl carbinol moiety. A product was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba346e6eaa64d382f12a96c02e214818
https://doi.org/10.1016/s0040-4039(98)02238-2
https://doi.org/10.1016/s0040-4039(98)02238-2
Publikováno v:
Tetrahedron Letters. 39:6019-6022
The reduction of (trifluoroacetyl)biphenyl derivatives with catecholborane as a stoichiometric reductant in the presence of the oxazaborolidine catalyst derived from L-threonine in dichloromethane-toluene at −90 °C proceeds to give the correspondi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5d38ea17f40c0a0cceebd7cb6f6da1e
https://doi.org/10.1016/s0040-4039(98)01237-4
https://doi.org/10.1016/s0040-4039(98)01237-4
Publikováno v:
Tetrahedron. 54:10265-10274
Highly enantioselective reduction of 1,2-diaryl-2-benzyloxyiminoethanones and 1,2-diarylethanediones was conducted using oxazaborolidine derived from L-threonine and borane complexes to give β-imino alcohols and 1,2-diaryl-1,2-ethanediols in high en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2025bcd5ae484fd18037d02148ba941
https://doi.org/10.1016/s0040-4020(98)00483-9
https://doi.org/10.1016/s0040-4020(98)00483-9
Publikováno v:
Tetrahedron. 54:8393-8402
The reduction of trifluoromethyl ketones containing a sulfur functionality by the crude alcohol dehydrogenase from Geotrichum proceeded successfully, and the corresponding optically active alcohols were synthesized with high yields and excellent enan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::574dc25a7bcbd71e57a4b9c39ef91224
https://doi.org/10.1016/s0040-4020(98)00439-6
https://doi.org/10.1016/s0040-4020(98)00439-6
Publikováno v:
Tetrahedron. 54:5523-5530
Novel chiral fluorinated building block, (S)β-chlorodifluoromethyl-β-propiolactone with up to >99% ee was prepared using the Lewis acid catalyzed [2+2]cycloaddition of ketene with chlorodifluoroacetaldehyde followed by enzymatic resolution with a l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f30f1f6fa55449a2db4ebf15774845a
https://doi.org/10.1016/s0040-4020(98)00240-3
https://doi.org/10.1016/s0040-4020(98)00240-3
Publikováno v:
Tetrahedron. 54:4267-4276
The bakers' yeast reduction of (trifluoroacetyl)biphenyl derivatives produces (R)-trifluoromethyl biphenylyl carbinols in high enantioselectivity, whereas the reduction of the same derivatives with Geotrichum candidum acetone powder gives the corresp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e3719f0d576d0c07130ad63b5244e73
https://doi.org/10.1016/s0040-4020(98)00144-6
https://doi.org/10.1016/s0040-4020(98)00144-6
Autor:
Tamotsu Fujisawa, Makoto Shimizu
Publikováno v:
Journal of Synthetic Organic Chemistry, Japan. 56:672-680
Widespread use of homochiral 1, 2-diary1-1, 2-diaminoethanes and 2-amino-1, 2-diarylethanols as chiral auxiliaries coupled with difficulties associated with their preparation prompted us to investigate new methodologies for their syntheses. For the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::545a46d166de6147dd8080b7f2c365bb
https://doi.org/10.5059/yukigoseikyokaishi.56.672
https://doi.org/10.5059/yukigoseikyokaishi.56.672
Publikováno v:
Tetrahedron Letters. 39:67-70
Improvement of the enantioselectivity and enhancement of the reactivity were achieved in the bakers' yeast reduction of the β-keto ester derivatives by the addition of a sulfur compound. © 1997 Elsevier Science Ltd. All rights reserved.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79e0068ffece954efca224125d35ee37
https://doi.org/10.1016/s0040-4039(97)10490-7
https://doi.org/10.1016/s0040-4039(97)10490-7