[HTML][HTML] Reactivities and mechanisms in organic reactions involving activation of elemental sulfur under basic conditions

P Conen, MAR Meier - Tetrahedron Chem, 2024 - Elsevier
As a readily available and benign waste product of the petrochemical industry, elemental
sulfur displays desirable characteristics as a raw material for new processes. Accordingly …

Sulfur-Promoted Access to 3-Arylquinoxalin-2-ones by Oxidative Coupling of o-Phenylenediamines with Arylacetates

LA Nguyen, TY Tran, QA Ngo, DH Mac… - Organic …, 2024 - ACS Publications
We disclose the synthesis of 3-arylquinoxalin-2-ones from o-phenylenediamines and readily
available arylacetates. The method harnesses the selective oxidative property of elemental …

Divergent synthesis of polythioindoles using elemental sulfur as the polysulfur source under metal-free conditions

P Ni, J Tan, Y Tan, W Jiang, GJ Deng - Organic Chemistry Frontiers, 2024 - pubs.rsc.org
Here, we demonstrate the divergent synthesis of symmetrical or unsymmetrical
tetrathiadiindoles and pentathiepino [6, 7-b] indoles from indoles and elemental sulfur under …

Divergent Reaction of Alkynes and TsCN: Synthesis of β-Sulfinyl Alkenylsulfones and (E)-Vinyl Sulfones

G Peng, X Yu, J Bai, R Yang, F Wei… - The Journal of Organic …, 2024 - ACS Publications
An efficient and high-selectivity approach for the divergent synthesis of β-sulfinyl
alkenylsulfones and (E)-vinyl sulfones from alkynes and TsCN is described. A series of …

Unveiling Synthesis, Characterization, and Assessing Antimicrobial Efficacy of quinoxaline-Based Oxazole Derivatives

DK Katariya, AK Vyas, P Bhanderi, PM Shah… - Russian Journal of …, 2024 - Springer
Objective: The objective of this study is to investigate the metal catalyst-free synthesis and
antimicrobial activity of quinoxaline-based oxazole derivatives (IVa–IVp), confirming their …

Novel Catalyst-Free Synthesis of Some 3-Alkylaminoquinoxaline-2(1H)-thiones and 3-Alkyloxyquinoxaline-2(1H)-thiones in Ethanol

SM El Rayes, IAI Ali, W Fathalla, MA Ghanem… - ACS …, 2025 - ACS Publications
Seventeen 3-alkylaminoquinoxaline-2 (1 H)-thiones and 3-alkyloxyquinoxaline-2 (1 H)-
thiones were prepared by a novel thionation protocol from the readily available quinoxaline …

Sodium sulfide-promoted regiodefined redox condensation of o-nitroanilines with aryl ketones to benzo [a] phenazines and quinoxalines

DL Le, NB Vo, TTT Nguyen, QA Ngo… - Organic & …, 2024 - pubs.rsc.org
Inexpensive sodium sulfide trihydrate was found to promote unprecedented 6e-regio-
predefined redox condensation of o-nitroanilines with α-tetralones to benzo [a] phenazines …

Base‐Catalyzed Synthesis of N‐Aryl Thioacetamides from Multicomponent Reaction of Phenylacetylenes, Sulfur and Anilines

M Hang Nguyen, H Sam Nguyen… - European Journal of …, 2024 - Wiley Online Library
In the presence of a base catalyst (20 mol%) such as DBU, DABCO or Na2S⋅ 3H2O/N‐
methylpyrrolidone, phenylacetylenes were found to efficiently undergo sulfurative amination …