Reaction of 2-diazo-1,2-diarylethanones with benzophenone<i>n</i>-(diaryl)acyl hydrazones: Formation of 1,3,4-oxadiazolines
作者:Girija S. Singh
DOI:10.1002/jhet.5570430634
日期:2006.11
The reaction of 2-diazo-1,2-diarylethanones with benzophenone N-(diaryl)acyl hydrazones leads to the formation of 1,3,4-oxadiazolines. The products have been characterized on the basis of satisfactory analytical and spectral (IR, 1H and 13C NMR, and Mass) data. The mechanism for the formation of products through the reaction of diarylketenes, generated in situ from thermal decomposition of the 2-diazo-1
2-重氮-1,2-二芳基酮与二苯甲酮N-(二芳基)酰基的反应导致形成1,3,4-恶二唑啉。根据令人满意的分析和光谱(IR,1 H和13 C NMR和质量)数据对产品进行了表征。该机构用于通过diarylketenes的反应形成的产物,产生原位从2-重氮-1,2- diarylethanones的热分解,具有亚氨基氮和分子内[2 + 3]偶极环加成建议。
Die umsetzung von diazoverbindungen mit azoverbindungen—VII
The reaction of diazofluorene with azodibenzoyl yields fluorene-dibenzoyl-hydrazone (Ia) which by reaction with diphenylketene leads to the azetidinone IX. Compound Ia is also formed when the alkali- or Ag-salt of Fluorene-monobenzoyl-hydrazone Va or fluorene-hydrazone is reacted with benzoyl chloride. With azodiacetyl, diazofluorene forms the oxadiazoline IIb, which on melting rearranges to fluor