Phthalimides. I. Base-catalyzed lossen rearrangement and acid-catalyzed beckmann rearrangement with N-(arylsulfonyloxy)phthalimides.
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概要
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<I>N</I>-(Arylsulfonyloxy)phthalimides undergo base-catalyzed Lossen rearrangement with amines, and amino acids to give <I>N</I>,<I>N</I>′-diaryl ureas and amine salts. They behave similarly with phenylhydrazine in alcohol to give a mixture of <I>N</I>-hydroxyphthalimide and phenylhydrazine salts. However, <I>N</I>-(arylsulfonyloxy)phthalimides undergo isomerization followed by Beckmann rearrangement to give a mixture of 4-aryl-1<I>H</I>-2,3-benzoxazin-1-ones and diarylsulfones.
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著者
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Nada A.
Faculty of Science, Ain Shams University
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Fahmy A.
Faculty of Science, Ain Shams University
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Aly N.
Faculty of Science, Ain Shams University