Results 31 to 40 of about 12,036 (267)

Predictive, Data‐Driven Design of Red‐Light Photoredox Catalysts for C─Heteroatom Bond Formation

Angewandte Chemie, EarlyView.
From redox numbers to red light: Donor oxidation and core reduction potentials predict E0‐0 in cyanoarene dyes, guiding selection of an efficient red‐light catalyst, 4MeODPATPN (PC13). Under 620 nm light, PC13 facilitates Ni‐catalyzed C─heteroatom cross‐couplings (C─N, C─O, C─S) with high functional‐group tolerance and reduced hydrodehalogenation ...
Amir Gizatullin, Tingting Yuan, Sascha Grotjahn, Luigi Cavallo, Burkhard König, Chen Zhu, Magnus Rueping   +6 more
wiley   +2 more sources

New fused triazinium systems from (alkoxycarbonyl)azinium N-aminides [PDF]

, 2007
2-(Alkoxycarbonyl)cycloimmonium N-aminides are efficient 1,4-dipoles that react with different types of reagents such as carbodiimides, benzoyliso(thio)cyanates and heterocyclic imidoyl chlorides to give new heterobetaines containing fused [l,2,4 ...
Bátori, Bátori, Bátori, Cuadro, Devi, Dombrowski, Facklam, Huisgen, Huisgen, Huisgen, Liu, Martinez, Messmer, Molina, Molina, Nair, Nair, Ollis, Padwa, Padwa, Palko, Pastor, Pastor, Potts, Potts, Rigby, Ritter, Tamura, Tejeda, Ungureanu, Valenciano, Valenciano, Valenciano, Westphal   +33 more
core   +3 more sources

Staudinger/aza-Wittig Reaction to Access Nβ-Protected Amino Alkyl Isothiocyanates [PDF]

, 2018
A unified approach to access Nβ-protected amino alkyl isothiocyanates using Nβ-protected amino alkyl azides through a general strategy of Staudinger/aza-Wittig reaction is described.
Durgamma, S., Santhosh, L., Shekharappa, V., Sureshbabu, V.V.   +3 more
core   +1 more source

Transcriptomic analyses of nitrogen assimilation processes in a Chinese strain of Aureococcus anophagefferens

Genomics Data, 2015
Aureococcus anophagefferens is a harmful alga that dominates plankton communities during brown tides in North America, Africa, and Asia. In order to figure out the processes of nitrogen assimilation in a Chinese strain of A.
Li-Na Chen, Hong-Po Dong, Kai-Xuan Huang, Hua-Long Wang, Song-Hui Lu, Jing-Yi Cen, Yue-Lei Dong   +6 more
doaj   +1 more source

Synthesis of N-Fmoc-ProtectedAmino Alkyl Thiocyanates/Selenocyanates and their Applicationin the Preparation of 5-Substituted S/Se-Linked Tetrazoles [PDF]

, 2011
A novel class of N-Fmoc-protected amino alkyl thiocy- anates/selenocyanates has been prepared by thiocyanation/seleno-cyanation of the corresponding alkyl iodides. These thiocyanates/selenocyanates undergo a facile [2+3]-cycloaddition reaction
Basavalingappa, P. Vasantha, Hosahalli, P. Hemantha, Vommina, V. Sureshbabu   +2 more
core   +1 more source

Theory of Chiral Order in Random Copolymers

, 1995
Recent experiments have found that polyisocyanates composed of a mixture of opposite enantiomers follow a chiral ``majority rule:'' the chiral order of the copolymer, measured by optical activity, is dominated by whichever enantiomer is in the majority ...
A. L. Kholodenko, C. J. Eckhardt, C.-M. Chen, D. S. Chung, J. M. Schnur, J. M. Schnur, J. V. Selinger, J. V. Selinger, J. V. Selinger, J. V. Selinger, J.-C. Lin, M. M. Green, M. M. Green, M. Zhang, O. Heinonen, P. Nelson, P.-G. de Gennes, R. L. B. Selinger, R. Viswanathan, R. Zhang, S. Lifson, S. Lifson, T. Nattermann, T. Nattermann, W. Helfrich, Y. Imry   +25 more
core   +2 more sources

A Radical Cascade with Double Intramolecular Hydrogen Atom Transfer for the Generation of Bisfunctionalized Cyclopentanes from Linear Alkynes

Angewandte Chemie, Volume 138, Issue 5, 28 January 2026.
A radical cascade process involving the activation of two aliphatic C–H bonds in a series of five elementary steps converts readily available terminal alkynes into functionalized cyclopentylmethyl arylsulfones. The methodology delivers flexible synthetic intermediates and was applied to the preparation of diquinanes and triquinanes possessing a rare ...
Lise Benoist, Éléonore Barbier, Mariam Sangare, Philippe Renaud, Fabrice Dénès   +4 more
wiley   +2 more sources

Characterising Particulate Organic Nitrogen at A Savannah-Grassland Region in South Africa

Atmosphere, 2019
Although atmospheric organic N compounds are considered to be important, especially in new particle formation and their contribution to brown carbon, these species are not that well understood.
Wanda Booyens, Pieter G. Van Zyl, Johan P. Beukes, Jose Ruiz-Jimenez, Matias Kopperi, Marja-Liisa Riekkola, Ville Vakkari, Miroslav Josipovic, Markku Kulmala, Lauri Laakso   +9 more
doaj   +1 more source

New Polyurethanes with a polyurea matrix [PDF]

, 2012
Based on a previously published (Peshkov 2011) synthesis route of nanoscale oligourea dispersion polyols (NODP) a new type of polyurethanes with a polyurea matrix was developed.
Behrendt, Gerhard, Evtimova, Rozeta, Herzog, Michael, Peshkov, Vladimir   +3 more
core   +1 more source

Synthesis of a new class of highly fluorinated aliphatic diisocyanates [PDF]

, 1971
Synthesis is basis for preparation of polyurethanes that are compatible with liquid oxygen.
Warner, D. A.
core   +1 more source