Results 11 to 20 of about 159,996 (294)

Towards energetically viable asymmetric deprotonations : selectivity at more elevated temperatures with C2-symmetric magnesium bisamides [PDF]

, 2011
A novel chiral magnesium bisamide has enabled the development of effective asymmetric deprotonation protocols at substantially more elevated temperatures.
Aggarwal, Alexakis, Allan, Allan J. B. Watson, Anderson, Aoki, Aoki, Aoki, Aoki, Bassindale, Blümke, Brownbridge, Brownbridge, Bunn, Bunn, Bunn, Busch-Petersen, Carswell, Clegg, Conway, Corey, Cousins, Eaton, Eaton, Graf, Graf, Gronnow, Hama, Henderson, Henderson, Henderson, Henderson, Henderson, Hodgson, Ila, Kerr, Kerr, Kerr, Knochel, Leitner, Linsey S. Bennie, Melzig, Michael Middleditch, Mulvey, Navarro, Netherton, Sato, Shirai, Shirai, Simpkins, Simpkins, Westerhausen, William J. Kerr, Wunderlich, Çalimsiz   +54 more
core   +1 more source

Asymmetric synthesis of γ-chloro-α,β-diamino- and β,γ-aziridino-α-aminoacylpyrrolidines and -piperidines via stereoselective Mannich-type additions of N-(diphenylmethylene)glycinamides across α-chloro-N-sulfinylimines [PDF]

, 2012
The asymmetric synthesis of new chiral gamma-chloro-alpha,beta-diaminocarboxylamide derivatives by highly diastereoselective Mannich-type reactions of N-(diphenylmethylene) glycinamides across chiral alpha-chloro-N-p-toluenesulfinylaldimines was ...
Augustyns, Koen, Callebaut, Gert, De Kimpe, Norbert, Mangelinckx, Sven, Tornroos, Karl W, Van der Veken, Pieter   +5 more
core   +3 more sources

Thermoresponsive poly(2-oxazoline)s, polypeptoids, and polypeptides [PDF]

, 2017
This review covers the recent advances in the emerging field of thermoresponsive polyamides or polymeric amides, i.e., poly(2-oxazoline)s, polypeptoids, and polypeptides, with a specific focus on structure-thermoresponsive property relationships, self ...
Hoogenboom, Richard, Schlaad, Helmut
core   +2 more sources

Dehydration of main-chain amides in the final folding step of single-chain monellin revealed by time-resolved infrared spectroscopy [PDF]

, 2008
Kinetic IR spectroscopy was used to reveal β-sheet formation and water expulsion in the folding of single-chain monellin (SMN) composed of a five-stranded β-sheet and an α-helix. The time-resolved IR spectra between 100 μs and 10 s were analyzed based on
Goto, Yuji, Ishimori, Koichiro, Kimura, Tetsunari, Konno, Takashi, Maeda, Akio, Morishima, Isao, Nishiguchi, Shingo, Takashi, Satoshi   +7 more
core   +1 more source

Low Temperature Precursor Route for Highly Efficient Spherically Shaped LED-Phosphors M2Si5N8:Eu2+ (M = Eu, Sr, Ba) [PDF]

, 2009
The highly efficient nitridosilicate phosphors M2Si5N8 (M = Sr, Ba, Eu) for phosphor-converted pc-LEDs were synthesized at low temperatures using a novel precursor route involving metal amides M(NH2)2.
Gál Z. A., Huppertz H., Huppertz H., Huppertz H., Höppe H. A., Imamura H., Jüstel T., Krauss H. L., Lange H., Li J., Li Y. Q., Li Y. Q., Linde G., Lutz H., Mueller-Mach R., Piao X., Schlieper T., Schmidt P., Schnick W., Schnick W., Schnick W., Senker J., Xie R.-J., Xie R.-J., Yamada M., Yamane H.   +25 more
core   +1 more source

Amide-Amide and Amide-Water Hydrogen Bonds: Implications for Protein Folding and Stability [PDF]

Journal of the American Chemical Society, 1994
Amide-amide hydrogen bonds have been implicated in directing protein folding and enhancing protein stability. Inversion transfer (13)C NMR spectroscopy and IR spectroscopy were used to compare the ability of various amide solvents and of water to alter the rate of the cis-trans isomerization of the prolyl peptide bond of Ac-Gly-[β,δ-(13)C]Pro-OMe and ...
Ronald T. Raines, Eric S. Eberhardt
openaire   +3 more sources

One-Pot Synthesis of Single-Source Precursors for Nanocrystalline LED Phosphors M2Si5N8:Eu2+ (M = Sr, Ba) [PDF]

, 2009
Highly efficient red-emitting nitridosilicate phosphors Sr2Si5N8:Eu2+ and Ba1.5Sr0.5Si5N8:Eu2+ (doping level 1%) applicable to phosphor converted pc-LEDs were synthesized in nanocrystalline form at low temperatures employing a novel single-source ...
Schmidt, Peter J., Schnick, Wolfgang, Zeuner, Martin   +2 more
core   +1 more source

Amide nitrogen pyramidalization changes lactam amide spinning [PDF]

Nature Communications, 2019
AbstractAlthough cis-trans lactam amide rotation is fundamentally important, it has been little studied, except for a report on peptide-based lactams. Here, we find a consistent relationship between the lactam amide cis/trans ratios and the rotation rates between the trans and cis lactam amides upon the lactam chain length of the stapling side-chain of
Yuko Otani, Xin Liu, Hisashi Ohno, Siyuan Wang, Luhan Zhai, Aoze Su, Masatoshi Kawahata, Kentaro Yamaguchi, Tomohiko Ohwada   +8 more
openaire   +3 more sources

N,N-bis-(dimethylfluorosilylmethyl)amides of N-organosulfonylproline and sarcosine: synthesis, structure, stereodynamic behaviour and in silico studies [PDF]

, 2016
(O→Si)-Chelate difluorides R3R2NCH(R1)C(O)N(CH2SiMe2F)2 (9a–c, R1R2 = (CH2)3, R3 = Ms (a), Ts (b); R1 = H, R2 = Me, R3 = Ms (c)), containing one penta- and one tetracoordinate silicon atoms were synthesized by silylmethylation of amides R3R2NCH(R1)C(O ...
Arkhipov, Dmitry E., Bassindale, Alan R., Baukov, Yuri I., Bylikin, Sergey Yu., Korlyukov, Alexander A., Kramarova, Eugenia P., Lagunin, Alexey A., Negrebetsky, Vadim V., Nikolin, Alexey A., Shipov, Alexander G., Taylor, Peter G.   +10 more
core   +1 more source

Fully Chlorinated N-Silyl Amides of Titanium and Tungsten [PDF]

, 1997
The reaction of hexachlorodisilazanyllithium (Cl3Si)2NLi (1), with TiCl4 leads selectively to the novel fully chlorinated amides (Cl3Si)2NTiCl3 (2) or [(Cl3Si)2N]2 TiCl2 (3), respectively, depending on the molar ratio of the starting materials.
Milius, Wolfgang, Schnick, Wolfgang, Schwarze, Bernd   +2 more
core   +1 more source