Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Guang-Ri Sun"'
Publikováno v:
Tetrahedron Letters. 45:3597-3601
A series of optically pure 3,3′-bis(RO)-MeO-BIPHEP derivatives are prepared and used in palladium catalyzed asymmetric transformations. The phosphine oxide of (±)-5 is prepared in four steps from p-methoxyphenol and resolved using the novel resolv
Publikováno v:
New Journal of Chemistry. 27:409-413
High temperature (162°C) reductions of aromatic amides were studied to extend the useful range of functional group transformations by NaBH4. Primary aromatic amides were reduced to the amines with NaBH4–diglyme at 162°C. Reduction proceeds via fa
Publikováno v:
Synlett. 2000:0619-0622
Autor:
Tashia V. Caughran, Kathleen M. Schenck, Paul H. Chen, Alfred D. Thruston, Terrance L. Floyd, Timothy W. Collette, Susan D. Richardson, Guang-ri Sun, George Majetich, Benjamin W. Lykins
Publikováno v:
Environmental Science & Technology. 33:3378-3383
Using a combination of mass spectrometry and infrared spectroscopy, disinfection byproducts were identified in ozonated drinking water containing elevated bromide levels and in ozonated water treated with secondary chlorine or chloramine. Only one br
Autor:
Terrance L. Floyd, Benjamin W. Lykins, Timothy W. Collette, George Majetich, Guang-ri Sun, Alfred D. Thruston, Paul H. Chen, Kathleen M. Schenck, Susan D. Richardson, Tashia V. Caughran
Publikováno v:
Environmental Science & Technology. 33:3368-3377
Using a combination of spectral identification techniquesgas chromatography coupled with low- and high-resolution electron-impact mass spectrometry (GC/EI-MS), low- and high-resolution chemical ionization mass spectrometry (GC/CI-MS), and infrared sp
Publikováno v:
Journal of Organometallic Chemistry. 574:193-205
1,ω-Bis[8-(dimethylamino)-1-naphthyl]-1,ω-difluorotrisilane 1 (ω=3) and tetrasilane 2 (ω=4) have been prepared. The X-ray crystallography of dl-1 and meso-1 shows unsymmetrical structures having different coordination modes at the two terminal si
Publikováno v:
The Journal of Organic Chemistry. 63:2564-2573
Commercially available carbodiimides in hydroxylic solvents containing hydrogen peroxide with mildly basic or acidic catalysts have been found to promote the epoxidation of olefins. A commercially available 30% aqueous solution of hydrogen peroxide s
Autor:
Guang-Ri Sun, Kohei Tamao, Axel Fischer, P Sakhaii, Peter G. Jones, Reinhard Schmutzler, V Plack
Publikováno v:
Journal of Organometallic Chemistry. 553:111-114
The E - and Z -isomers ( 1a,1b ) of 1,2-bis(fluorodimethylsilyl)-1,2-diphenylethene have been investigated by 1 H, 13 C and 19 F NMR spectroscopy, mass spectrometry and single crystal X-ray structure analysis. The NMR spectra of both compounds were m
Publikováno v:
Organometallics. 16:780-788
Highly selective cross-coupling reactions promoted by lithium metal have been achieved between aminodichloromonosilanes R(Et2N)SiCl2 (R = Me, Et, Ph, Et2N) and 2 equiv of Me3SiCl (1) or (Et2N)Me2Si...
Publikováno v:
ChemInform. 27
N-Alkyl-1,3-dichloro-1,3-disila-isoindolines are reduced with lithium naphthalenide at –78 °C to give the 1,3-dilithio drivatives which can be trapped with electrophiles.