[HTML][HTML] The multifaceted opportunities provided by the pheomelanin-inspired 1, 4-benzothiazine chromophore: A still-undervalued issue

ML Alfieri, L Panzella - Molecules, 2023 - mdpi.com
1, 4-Benzothiazines are the main building blocks of the naturally occurring pheomelanin
pigments, and their chromophoric properties have been strongly related to the well-known …

Micelle-mediated synthesis of quinoxaline, 1, 4-benzoxazine and 1, 4-benzothiazine scaffolds from styrenes

B Teli, MM Wani, S Jan, HR Bhat… - Organic & Biomolecular …, 2024 - pubs.rsc.org
A range of heterocycles based on quinoxalines, 1, 4-benzoxazines and 1, 4-benzothiazines
have been accessed from styrenes by reacting them with benzene-1, 2-diamine, 2 …

Synthesis of 1, 4-benzoxazine derivatives from α-aminocarbonyls under transition-metal-free conditions

L Hao, G Wu, Y Wang, X Xu, Y Ji - New Journal of Chemistry, 2023 - pubs.rsc.org
Herein, we report a one-pot tandem reaction for the synthesis of 1, 4-benzoxazine
derivatives with up to 83% yield. The present protocol, using ethanol as a solvent and …

Three‐Component Synthesis of Fluorescent 1, 4‐Benzothiazin‐2‐ones Through Thiol‐Free Iodine‐Catalyzed Cyclization

DB Rajkumar, K Gnanaoli… - European Journal of …, 2024 - Wiley Online Library
A convergent synthesis of 2H‐benzo [b][1, 4] thiazin‐2‐one was achieved via iodine‐
catalyzed three‐component reaction. This strategy involves the formation of two new C− S …