prov:value
| - It has been found that a process for the production of cyclene ##STR3## characterized in that in a single-pot process, triethylenetetramine is reacted with 40% glyoxal at 20?? C. to 80?? C. in a polar, protic solvent, preferably methanol, ethanol, isopropanol, butanol, glycol, water or mixtures thereof, especially preferably ethanol, within 4 to 40 hours, preferably 15 to 20 hours; after the solve
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