Abstract
New efficient methods for synthesis of enalH2 or 1,6-bis(2-pyridyl)-2,5-bis(2-hydroxy-3-formyl-5-methylbenzyl)-2,5-diazahexane 1a and of tnalH2 or 1,7-bis(2-pyridyl) -2,6-bis(2-hydroxy-3-formyl-5-methylbenzyl)-2,6-diazaheptane, 1b are described