Results 271 to 280 of about 3,269,112 (357)

Introducing the Cis‐2,3‐Bis(trifluoromethyl)cyclopropyl Chemotype: Late‐Stage Installation and Stereoelectronic Properties

ChemistryEurope, EarlyView.
The cis‐2,3‐bis(trifluoromethyl)cyclopropyl chemotype is introduced. The steric demand of this motif is intermediate between that of the heptafluoroisopropyl and prefluorotertbutyl groups; yet, it induces significantly less lipophilicity than these due to its facial polarity.
Daniel Gaviña, Zeyu Feng, David Herrero, Martin Simon, Christopher Golz, Manuel Alcarazo   +5 more
wiley   +1 more source

An Ultrahigh-Performance Liquid Chromatography Coupled with Tandem Mass Spectrometry (UHPLC-MS/MS) Method for Toxicity and Safety Level Assessment of Oxygen Heterocyclic Compounds and Terpene in Cold-Pressed Grapefruit Essential Oils. [PDF]

ACS Omega
Zahiruddin S, Wang YH, Kothapalli HB, Avula B, Chittiboyina AG, Khan IA.   +5 more
europepmc   +1 more source

Heterocyclic Compounds [PDF]

Nature, 1964
openaire   +1 more source

Organophotoredox/Cobalt‐Catalyzed Retro‐Hydroformylation of Aldehydes

ChemistryEurope, EarlyView.
A new photoredox/cobalt retro‐hydroformylation is developed. This one‐pot two‐step process involves the in situ formation of the corresponding 1,4‐dihydropyridine as key intermediate. Under mild reaction conditions, alkenes are efficiently produced from a wide range of aliphatic α‐monosubstituted aldehydes, with high functional‐group tolerance.
Augustin Nouaille, Emmanuel Magnier, Corinne Gosmini, Guillaume Dagousset   +3 more
wiley   +1 more source

Syntheses of Heterocyclic Compounds of Nitrogen. LXXIX

, 1952
Torizo Takahashi, Kenzo Satake
openalex   +2 more sources

Electrophilic Functionalization of Donor‐Stabilized Phosphanylboranes: A New Pathway toward Heavy 13/14/15 Parent Hydride‐Containing Compounds

ChemistryEurope, EarlyView.
A new way of obtaining mixed 13/14/15 hydride containing compounds stabilized only by a Lewis base is presented. The functionalization of IDipp·BH2PH2 (IDipp = 1,3‐Bis‐(2,6‐diisopropylphenyl)‐imidazolin‐2‐ylidene) by main group electrophiles leads to the formation of the compounds [IDipp·BH2PH2E]+ [E = H, CH3 SiEt3, Ge(SiMe3)3, SnMe3) which represent a
Robert Szlosek, Michael Seidl, Christoph Riesinger, Lisa Zimmermann, Amelie Sophie Niefanger, Christian Marquardt, Alexey Y. Timoshkin, Manfred Scheer   +7 more
wiley   +1 more source

Fe₃O₄@gC₃N₄@Thiamine: a novel heterogeneous catalyst for the synthesis of heterocyclic compounds and microextraction of tebuconazole in food samples. [PDF]

Sci Rep
Peiman S, Maleki B, Ghani M.
europepmc   +1 more source

Skeletal Editing from Pyridine to Aniline via C‐Insertion and N‐Isomerization

ChemistryEurope, EarlyView.
A concise protocol is presented that converts pyridines into anilines by externalizing the original pyridine nitrogen at either the "ipso" or "ortho" position, which results in para or meta‐primary aniline products. A key carbene‐insertion step precedes nitrogen migration, preserving both ring size and overall structure.
Yun Luo, Jing Dai, Yongchang Wei, Chang Min   +3 more
wiley   +1 more source

Enantioselective Synthesis of Sulfinamidines via Asymmetric Rhodium–Catalyzed Imidation of Sulfenamides

ChemistryEurope, EarlyView.
In this work, a catalytic enantioselective imidation approach is presented for the preparation of enantioenriched sulfinamidines from sulfenamides, employing a chiral dirhodium(II) tetracarboxylate catalyst. This method enables the imidation of N,N‐bisalkyl sulfenamides in yields of up to 98% and enantiomeric ratios up to 98:2, with a catalyst loading ...
Michael Andresini, Théo Bissonnier, Juline Courtois, Pascal Retailleau, Benjamin Darses, Jean‐François Poisson, Tanguy Saget, Philippe Dauban   +7 more
wiley   +1 more source

Heterocyclic Compounds [PDF]

Nature, 1967
openaire   +1 more source