A facile heterogeneous catalytic approach for one-pot synthesis of fused benzoxazinones using Cuβ zeolite and Evaluation of biological activities
作者:Suchitha Dasu、Krishna Sai Gajula、Vasu Amrutham、Murali Boosa、Ramulamma Madasu、Madhuri Lekkala、Sai Balaji Andugulapati、Narender Nama
DOI:10.1016/j.tet.2024.133931
日期:2024.4
A simple heterogeneouscatalytic process has been established for the single-step synthesis of fusedbenzoxazinones, quinazolinones, and thiadazines through Markownikoff's hydroamination followed by intramolecular cyclization usingCuβzeolite. The probability and limitations of this catalyticapproach were explored using various substrates. The efficiency and feasibility of scaling up the current
2‐Amino‐5‐nitrobenzolsulfonamide 1–4 werden zu entspr. Diaminen 12–15 reduziert und anschließend durch Diazotierung und Hypophosphit‐Behandlung in 5‐unsubstituierte Derivate 16–19 überführt. ‐ Hg(II)‐EDTA‐Dehydrierung von 16–18 liefert tricyclische Benzothiadiazine 22–24, die der Pipecoline 15/19 die Sulfonylaminale 20/21.