Results 181 to 190 of about 15,108 (284)

Synthesis and characterization of γ-acyloxyl-ε-caprolactones. [PDF]

iScience
Greischar G, Gono Phiri T, Haljun E, Ray J, Ourgessa M, Thesing G, Lofving L, Clarkson A, Bator S, Jno Baptise D, Cole W, Itschner M, Getzler YDYL.   +12 more
europepmc   +1 more source

Direct δ‐Lactone Synthesis From Free Alcohols via Photoinduced δ‐C(sp3)–H Carbonylation in Flow

Angewandte Chemie, EarlyView.
Herein, we have developed a photo‐flow platform for the δ‐C(sp3)─H carbonylative lactonization of free alcohols with carbon monoxide. The transformation integrates alkoxyl radical generation, selective 1,5‐HAT, CO incorporation, and radical–polar crossover to enable direct access to δ‐lactones from simple alcohol precursors.
Prakash Chandra Tiwari, Runkang Liu, Timothy Noël   +2 more
wiley   +2 more sources

Nitrosonium Ion-Catalyzed Oxidative Chlorination of Arenes. [PDF]

J Org Chem
Hsu JC, Chen YS, Hsiao CH, Hou DR.
europepmc   +1 more source

Ein chirales, sattelförmiges Nanographen mit zwei Heptagon‐integrierten [4]Helicenen

Angewandte Chemie, EarlyView.
Wir präsentieren eine neuartige Synthesestrategie für ein chirales, sattelförmiges Nanographen (cSNG) über eine zweistufige Oxidation eines prochiralen Anthracen‐Vorläufers. Die Scholl‐Oxidation liefert zunächst ein Schlüsselzwischenprodukt mit sp3‐defekten Heptagonen, die anschließende oxidative Dehydrierung ergibt das vollständig konjugierte cSNG ...
Felix Trautner, Boris Borrisov, Philipp Royla, Hongqing Zhao, Hartmut Komber, Li Wan, Evgenia Dmitrieva, Ji Ma, Jan J. Weigand, Qun Yang, Xinliang Feng, Wenhui Niu   +11 more
wiley   +1 more source

Catalytic Enantioselective Intramolecular Aza‐Michael Addition to α,β‐Unsaturated Esters

Angewandte Chemie, EarlyView.
A general method for accessing enantioenriched saturated N‐heterocycles via a catalytic enantioselective intramolecular aza‐Michael reaction to α,β‐unsaturated esters is described. A superbasic bifunctional iminophosphorane (BIMP) catalyst was key to enabling reactivity of the high pKa sulfonamide pronucleophile, whilst delivering good to excellent ...
Evan G. W. Rutter, Cameron J. MacRae, Haoran Xiong, Daniel Rozsar, Katherine F. P. Clarke, Darren J. Dixon   +5 more
wiley   +2 more sources

Asymmetric C-H Functionalization of Bicyclo[2.1.1]hexanes and Their 2-Oxa- and 2-Aza Derivatives via Rhodium Carbene Intermediates. [PDF]

J Am Chem Soc
Chen Z, Ly D, Kanda Y, Levterov VV, Panasiuk Y, Mykhailiuk PK, Musaev DG, Davies HML.   +7 more
europepmc   +1 more source

Isolation of a Highly Reactive CBNC Heterocumulene via Azidoborylene Photolysis: Facile Access to a Crystalline Dioxaborirane

Angewandte Chemie, EarlyView.
Azidoborylene photolysis results in the isolation of a reactive C═B═N═C heterocumulene bearing an ambiphilic boron centre. Addition of 3O2 to this species results in the clean conversion to a unique example of a dioxaborirane. ABSTRACT Oxidation of the formal boron(0) complex MeCAAC2B in the presence of tetrabutylammonium azide leads to the formation ...
Hayley King, Vignesh Pattathil, William Kennedy, Robert K. Szilagyi, Conor Pranckevicius   +4 more
wiley   +2 more sources

Azo-Povarov Cycloaddition of <i>N</i>-Carbonyl Aryldiazenes with <i>cis</i>,<i>trans</i>-Cycloocta-1,5-diene as a Fluorogenic Click Reaction for the Synthesis of Cinnoline Derivatives. [PDF]

J Org Chem
Jiménez-Aberásturi X, Vicario J, Abendroth F, Vázquez O, de Los Santos JM.   +4 more
europepmc   +1 more source

Specific Ion Effects of Chaotropic and Superchaotropic Anions Probed by Raman Hydration‐Shell Spectroscopy

Angewandte Chemie, EarlyView.
The vibrational frequencies of “dangling” water O─H bonds can be determined by Raman hydration‐ shell spectroscopy and used to differentiate chaotropes from kosmotropes and hydrophobes. Dangling O─H bonds are also detected around superchaotropic anions of the borate cluster type (B12X122−; X = H, F, Cl, Br, and I) but their frequencies do not directly ...
Werner M. Nau, Denilson Mendes de Oliveira, Andres S. Urbina, Harald Knorke, Jonas Warneke, Andrea Barba‐Bon, Dor Ben‐Amotz   +6 more
wiley   +2 more sources

Large-Scale Amino-Hydroxylation Using Tethered Nitreniums. [PDF]

Organic Synth
Sathyamoorthi S.
europepmc   +1 more source