Synthesis of 3H-Quinazolin-4-ones and 4H-3,1-Benzoxazin-4-ones via Benzylic Oxidation and Oxidative Dehydrogenation using Potassium Iodide-tert-Butyl Hydroperoxide
作者:R. Arun Kumar、C. Uma Maheswari、Satheesh Ghantasala、C. Jyothi、K. Rajender Reddy
DOI:10.1002/adsc.201000580
日期:2011.2.11
and elegant method for benzylic activation was demonstrated employing the potassium iodide/tert-butyl hydrogen peroxide catalytic system. This methodology was further extended for the synthesis of biologically important heterocycles namely, 3H-quinazolin-4-ones and 4H-3,1-benzoxazin-4-ones including mecloqualone and etaqualone which are important quinazolinone-based drugs used for the treatment of insomnia
用碘化钾/叔丁基过氧化氢催化体系证明了一种简单而优雅的苄基活化方法。该方法被进一步扩展为合成重要的杂环化合物,即3 H-喹唑啉-4-酮和4 H -3,1-苯并恶嗪-4-酮,包括甲氯喹酮和依他马酮,这是用于治疗的基于喹唑啉酮的重要药物失眠的好收成。
NHC-Catalyzed Benzylic C<sub>sp³</sub>-H Bond Activation of Alkylarenes and<i>N</i>-Benzylamines for the Synthesis of 3<i>H</i>-Quinazolin-4-ones: Experimental and Theoretical Study
作者:Anitha Alanthadka、E. Sankari Devi、Subbiah Nagarajan、Vellaisamy Sridharan、Ambigapathy Suvitha、C. Uma Maheswari
DOI:10.1002/ejoc.201600792
日期:2016.10
catalyzed benzylic Csp³–H bondactivation of alkylarenes and N-benzylamines under metal-free conditions was developed. This organocatalyzed oxidative transformation afforded the corresponding carbonyl derivatives in good to excellent yields. A variety of alkylarenes and N-benzylamines were tolerated under the optimized reaction conditions. The established method was further extended to the synthesis of biologically
Synthesis of Cu-catalysed quinazolinones using a C<sub>sp3</sub>–H functionalisation/cyclisation strategy
作者:Aniket V. A. Gholap、Soham Maity、Carola Schulzke、Debabrata Maiti、Anant R. Kapdi
DOI:10.1039/c7ob01723e
日期:——
A series of 2,3-disubstituted-4(3H)-quinazolinones were synthesised via a copper-catalysed Csp3–H functionalisation/cyclisation of 2-amino-N,N-dialkylbenzamides. In comparison to the reported methods this strategy allows an easy access to diversely substituted quinazolinones under mild conditions in air. The reaction also exhibits good functionalgroup tolerance and would be of value to heterocyclic