Results 91 to 100 of about 173,680 (267)

Azide‐to‐Diazo Transformation Facilitated by Michael Addition via Phosphazide Formation

Angewandte Chemie, EarlyView.
A new type of Michael addition based on azide‐to‐diazo conversion is disclosed. This unusual transformation proceeds via 1,4‐addition accompanied by N─N bond cleavage of phosphazide intermediates under practical conditions. The high versatility of the resulting Michael adducts enables the synthesis of a wide variety of organonitrogen compounds ...
Tomoki Mano, Takahiro Yasuda, Gaku Orimoto, Suguru Yoshida   +3 more
wiley   +2 more sources

Sulfur‐Directed Construction of Vinyl Cyclopropanes from 1,3‐Dienes

Angewandte Chemie, EarlyView.
Sulfur takes control. A pending thioether acts as a molecular compass, directing carbene addition to the 1,3‐diene scaffold with exceptional regio‑ and diastereocontrol to forge sulfur‐substituted vinyl cyclopropanes (S‐VCPs) — molecular architectures inaccessible via conventional cyclopropanation strategies.
Anna Keimer, Jonas Rettig, Tim‐Niclas Streit, Bob Barthel, Mélissa Calmels, Moritz Malischewski, Franz‐Lucas Haut   +6 more
wiley   +2 more sources

Recent Achievements in the Synthesis of Heterocyclic Compounds by Phthalhydrazide-Based Multicomponent Reactions

, 2021
Ghodsi Mohammadi Ziarani, Negar Jamasbi, Fatemeh Mohajer   +2 more
openalex   +1 more source

Monofluoromethylation of N-Heterocyclic Compounds. [PDF]

Int J Mol Sci, 2023
Moskalik MY.
europepmc   +1 more source

Bent N‐Heterocyclic Allenes From a Well‐Defined Titanium Vinylidene Complex

Angewandte Chemie, EarlyView.
The syntheses and the structures of N‐heterocyclic allenes are reported. Allenes bearing fluorenylidene capping groups show markedly bent C═C═C units, a carbene‐like reactivity, and they can act as potent C‐donor ligands for metal complexes. ABSTRACT Allenes typically display a linear geometry. A notable exception occurs in allenes bearing two electron‐
Bastiaan Kooij, Damien W. Chen, Rosario Scopelliti, Farzaneh Fadaei‐Tirani, Kay Severin   +4 more
wiley   +2 more sources

Polycylic N-Heterocyclic Compounds. 53. One Step Synthesis of Imidazo[1,5-a]pyridine Derivatives by Vilsmeier Reaction Using N,N-Dimethylarylamides

, 1999
Takashi Hirota, Kenji Sasaki, Akifumi Tsurumori, Setsuo Kashino   +3 more
openalex   +1 more source

TBA−Br and Selectfluor Mediated Bromination of Glycals and Heterocyclic Compounds: Substrate Scope and Synthetic Utility [PDF]

, 2023
Mittali Maheshwari, Nazar Hussain
openalex   +1 more source

Iterative Synthesis of Pentacene Derivatives with Continuous Boron–Oxygen Bonds

Angewandte Chemie, EarlyView.
An iterative synthetic strategy enables the controlled introduction of continuous multiple B–O bonds at the zigzag edge of acenes. A simple two‐step cycle—ipso iodination and Suzuki cross‐coupling/condensation—efficiently constructs BO‐acenes ranging from naphthalene to pentacene.
Seonghwa Jeong, Si‐In Kim, Jonghwan Lee, Hwon Kim, Jinuk Jang, Jiyeon Kim, Wonyoung Choe, Seung Kyu Min, Young S. Park   +8 more
wiley   +2 more sources

SYNTHESIS OF CYANINE DYES BY THE CONDENSATION OF p-DIETHYLAMINOBENZALDEHYDE WITH .APPROPRIATE HETEROCYCLIC COMPOUNDS. PART Ill

, 1949
M. Q. DoJA, JoGESH CHANDRA BANERJEE
openalex   +1 more source

Porous Phenazine‐bridged Tetraoxa[8]Circulenes for Selective Gold Recovery and Heterogeneous Catalysis

Angewandte Chemie, EarlyView.
Gold recycling from electronic waste using porous materials is an emerging concept to reduce the environmental impact of gold mining. In this work, we report the synthesis of a highly porous phenazine‐derived tetraoxa[8]circulene polymer and its utilization in gold capture and heterogeneous catalysis.
Patrick W. Fritz, Eylül Attar, Timur Ashirov, Krzysztof Piech, Ali Coskun   +4 more
wiley   +2 more sources