Simple Synthesis of bis-N-Acetyl-1,2-Dihydro-(4H)-3,1-Benzoxazin-4-ones
Publish place: 27th Iranian Seminar on Organic Chemistry
Publish Year: 1398
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISOC27_363
تاریخ نمایه سازی: 19 اسفند 1399
Abstract:
4H-3,1-Benzoxazin-4-ones are valuable starting materials for the synthesis of a variety of heterocycles.1 Also, they are used directly or indirectly in many clinical applications.2 Contrary to the parent compounds 4H-3,1-benzoxazin-4-ones,3 very few synthetic routes have ever been reported for bis-1,2-dihydro-(4H)-3,1-benzoxazin-4-ones.4 Here, a convenient synthesis of bis-N-acetyl-1,2-dihydro-(4H)-3,1-benzoxazin-4-ones 4 are reported by first, a condensation reaction of anthranilic acid derivatives 1 with glyoxal 2 at room temperature and then, cyclization reaction of the produced Schiff-bases 3 with acetic anhydride under reflux conditions (Scheme 1). High yields of the desired products are obtained in high purity and simple work-up.
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Authors
Farzad Nikpour,
Department of Chemistry, Faculty of Sciences, University of Kurdistan, Sanandaj, Iran
Seyyedeh Hadis Hassani Samereh
Department of Chemistry, Faculty of Sciences, University of Kurdistan, Sanandaj, Iran
Jamal Azizi
Department of Chemistry, Faculty of Sciences, University of Kurdistan, Sanandaj, Iran