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First Example of the Formation of Bipolar Spiro σ‐Complexes from 6‐Bromo‐5,7‐dinitrobenzo[e]‐1,2,3,4‐tetrazine 1,3‐Di‐N‐oxide. |
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| Authors: | V A Voronina A E Frumkin S V Kurbatov A M Churakov O Yu Smirnov L P Olekhnovich |
| Abstract: | |
| Keywords: | other 6‐membered heterocycles (with 3 or more heteroatoms) ring closure reactions |