Results 121 to 130 of about 23,082 (272)

Polar Heterobenzylic C(sp³)-H Chlorination Pathway Enabling Efficient Diversification of Aromatic Nitrogen Heterocycles. [PDF]

J Am Chem Soc, 2023
Maity S, Lopez MA, Bates DM, Lin S, Krska SW, Stahl SS.   +5 more
europepmc   +1 more source

Investigating Hydrothermal and Radiation Effects on Nitrogen Heterocycles Relevant to Meteorite Parent Bodies

, 2017
Organic compounds in meteorites were likely transformed by a variety of processes on the asteroid parent body including aqueous, thermal, and radiolytic alteration.
Hammer, Phillip G.
core   +1 more source

Three Component Thio‐ and Carboboration of Alkynes: A Modular Route to Functionalised Bicyclic Boronates

Angewandte Chemie, EarlyView.
Three‐component thio‐ and carbo‐boration reactions to form functionalised benzoxaborinines and benzazaborinines are reported. The nucleophile scope includes thioethers, thiols, and (hetero)arenes. Mechanistic studies revealed a disparity between thioboration using thioethers and using thiols.
Laura Winfrey, Gary S. Nichol, Stephen P. Thomas, Dominic R. Willcox, Michael. J. Ingleson   +4 more
wiley   +2 more sources

Methylene Insertion into Nitrogen‐Heteroatom Single Bonds of 1,2‐Azoles via a Zinc Carbenoid: An Alternative Tool for Skeletal Editing

Advanced Science
The nitrogen‐heteroatom single bonds of 1,2‐azoles and isoxazolines underwent methylene insertion in the presence of CH2I2 (6 equiv.) and diethylzinc (3 equiv.) to produce a wide variety of the ring‐expanded six‐membered heterocycles.
Masato Tsuda, Taiki Morita, Yuto Morita, Jun Takaya, Hiroyuki Nakamura   +4 more
doaj   +1 more source

Alcohols as Alkylating Agents in the Cation-Induced Formation of Nitrogen Heterocycles. [PDF]

Angew Chem Int Ed Engl, 2022
Cox L, Zhu Y, Smith PJ, Christensen KE, Sidera Portela M, Donohoe TJ.   +5 more
europepmc   +1 more source

π‐Extended COUPY Fluorophores for Targeted Near‐Infrared Fluorescence and Lifetime Imaging in Live Cells

Angewandte Chemie, EarlyView.
π‐Extended COUPY dyes, obtained by vinylogation of coumarin‐based COUPY scaffolds, shift absorption, and emission deep into the NIR region while preserving compactness and synthetic accessibility. These bright, photostable dyes enable live‐cell imaging, FLIM, and site‐specific peptide conjugation, offering a modular platform for targeted bioimaging and
Diego Abad‐Montero, Manel Bosch, Rodrigo Garcés‐Castellanos, Michael Q. Schottenhamel, Sergio Pedraza‐Arevalo, Alejandro Ibáñez‐Costa, Justo P. Castaño, Tania García‐Becerra, Elena Rebollo, Marta E. Alberto, Antonio Francés‐Monerris, Vicente Marchán   +11 more
wiley   +2 more sources

Decoration of A-Ring of a Lupane-Type Triterpenoid with Different Oxygen and Nitrogen Heterocycles. [PDF]

Molecules, 2022
Sousa JLC, Albuquerque HMT, Silvestre AJD, Silva AMS.   +3 more
europepmc   +1 more source

A Mononuclear Ruthenium(V)‐Imido Complex With Hydrogen Bonding in the Second Coordination Sphere Forming Aziridines Without N‐Substituents From Alkenes in Water

Angewandte Chemie, EarlyView.
This study employs a RuV═NH complex with hydrogen‐bonding (HB) sites in the SCS to afford non‐N‐substituted aziridines selectively. Nitrogen‐atom transfer occurs from the RuV═NH complex to alkenes in water to produce aziridine derivatives in high yields.
Tomoya Ishizuka, Chisato Ogawa, Yoshihito Shiota, Shunsuke Nozawa, Hiroaki Kotani, Shin‐ichi Adachi, Kazunari Yoshizawa, Takahiko Kojima   +7 more
wiley   +2 more sources

Structural diversity using amino acid "Customizable Units": conversion of hydroxyproline (Hyp) into nitrogen heterocycles. [PDF]

Amino Acids, 2022
Hernández D, Porras M, Boto A.
europepmc   +1 more source

Synthesis of six membered heterocycles containing nitrogen or oxygen

, 2005
Six-membered heterocycles containing nitrogen and oxygen are prevalent in natural products and pharmaceutical drugs; hence efficient synthesis of these motifs is of great benefit.

core