Anomalous Beckmann Reaction in a Series of Oximes of 4-Aryl-2,7,7-trimethyl-5-oxo-5,6,7,8-tetrahydroquinolines in Polyphosphoric Acid. 2. Unexpected Synthesis of 3'-Ethoxycarbonyl-4',7',7'-trimethyl-4-oxo-2',6',7',8'-tetrahydrospiro(cyclohexa-2,5-diene-1,2'-pyrrolo[4,3,2-d,e]quinolines) |
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| Authors: | S V Tolkunov A I Khyzhan S V Shishkina O V Shishkin V I Dulenko |
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| Institution: | (1) L. M. Litvinenko Institute of Physical-Organic Chemistry and Coal Chemistry, National Academy of Sciences of Ukraine, Donetsk, 83114;(2) Institute of Monocrystals, National Academy of Sciences of Ukraine, Kharkov, 61001 |
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| Abstract: | Oximes of 3-ethoxycarbonyl-4-halo(methoxy)phenyl-2,7,7-trimethyl-5-oxo-5,6,7,8-tetrahydroquinolines are converted in polyphosphoric acid (PPA) into 3'-ethoxycarbonyl-4',7',7'-trimethyl-4-oxo-2',6',7',8'-tetrahydrospiro(cyclohexa-2,5-diene-1,2'-pyrrolo4,3,2-d,e]quinoline). An X-ray structural analysis has been carried out on one of the synthesized compounds. |
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| Keywords: | oximes of 4-aryl-3-ethoxycarbonyl-2 7 7-trimethyl-5-oxo-5 6 7 8-tetrahydroquinolines 3'-ethoxycarbonyl-4' 7' 7'-trimethyl-4-oxo-2' 6' 7' 8'-tetrahydrospiro(cyclohexa-2 5-diene-1 2'-pyrrolo[4 3 2-d e]quinolines) polyphosphoric acid |
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