Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Tohru Sakakibara"'
Autor:
Tohru Sakakibara, Tatsushi Kawai, Masami Takeuchi, Kentaro Yoshihara, Hiroshi Murakami, Seiji Ban, Hiroshi Kono
Publikováno v:
Key Engineering Materials. :501-506
Three kinds of dental zirconia (Cercon, NANOZR, and P-NANOZR) were ground and polished with seven kinds of clinical device and materials. After these grinding and polishing, the surface roughness and the glossiness were analyzed. The crystal phases o
Autor:
Tohru Sakakibara, Yuhya Watanabe
Publikováno v:
Tetrahedron. 65:599-606
The title compound was prepared via hetero-Diels–Alder reaction of 1-acetoxy-1,3-butadiene and thioaldehyde, followed by Pummerer rearrangement. Different from the corresponding sugar and 5a-carba sugar, C-inside isomer of 1,5-anhydro-4,6- O -benzy
Publikováno v:
Tetrahedron Letters. 47:1341-1346
Oligosaccharyl Fmoc-asparagine in which amide nitrogen of the asparagine side chain attached to the anomeric position at the reducing end, is a versatile building block and has been used for various glycopeptide synthesis using Fmoc solid-phase pepti
Publikováno v:
Tetrahedron Letters. 45:3287-3290
Described herein is a convenient synthesis of a glycopeptide analogue having an undecasaccharide and its stability towards peptide:N-glycosidase F (PNGase-F). To obtain the glycopeptide analogue, bromoacetamidyl undecasaccharide and undecapeptide con
Autor:
Miwa Shindo, Kiyotaka Suzuki, Shinya Narumi, Yasuhiro Kajihara, Akiko Sakai, Katsura Mochizuki, Chihiro Nagano, Tohru Sakakibara
Publikováno v:
Tetrahedron Letters. 44:5711-5714
Methyl 4,6-O-benzylidene-2,3-dideoxy-3-C-p-tolylsulfonyl-2-C-p-tolylthio-β-d-glucopyranoside and its 5a-carba-dl-analog exit mainly in a non-chair conformation in solutions, but the latter occupies a chair conformation in a solid state.
Publikováno v:
Carbohydrate Research. 331:455-459
A new fluorescent assay for the sialyltransferase reaction was established. After incubation of the sialyltransferase reaction, the sialyloligosaccharide obtained was treated by acid hydrolysis, and then the NeuAc that was released was labeled with 1
Publikováno v:
Journal of the American Chemical Society. 122:5678-5694
A one-pot enzymatic 13C-labeling method for the 3-position of sialic acid (NeuAc) analogues has been developed using NeuAc aldolase, lactate dehydrogenase (LDH), alcohol dehydrogenase (ADH), and nucleotide pyrophosphatase (NPP). This method consists
Publikováno v:
Journal of Carbohydrate Chemistry. 19:783-788
Although the rate of proton abstraction (kinetic acidity) frequently plays an essential role in determination of reaction pathways and is of theoretical interest,1 it is still controversial whether an oxygen atom activates or deactivates the abstract
Publikováno v:
Journal of Carbohydrate Chemistry. 17:1249-1258
An efficient route for the synthesis of octamannan 1, found in high mannose type sugar chains, is described. to construct octasaccharide 1 by as few synthetic steps as possible, we employed a chemoenzymatic strategy: the enzymatic synthesis of oligos
Autor:
Kiyohisa Tokuda, Toshimi Kamitani, Chihiro Nagano, Tohru Sakakibara, Akinori Seta, Takeshi Tamura, Shinji Ito
Publikováno v:
Tetrahedron Letters. 39:591-594
Themodynamic stability of 3-C-nitro- d -glucol and - d -allal derivatives as well as the corresponding 5a-carba sugars was reproduced by ab initio (6-31G ∗ ) calculations. The calculations also predicted that 3-C-nitro- d -gulal should be more stab