Copper(II)-assisted hydrolysis of cyclic ureas: Transformation of 1-(pyridin-2-yl)-2,3,7,8-tetrahydro-1 H -imidazo[2,1- b ][1,3,5]triazepin-5(6 H )-ones into N 1 -[1-(pyridin-2-yl)imidazolidin-2-ylidene]-ethane-1,2-diamine ligands

Copper(II)-assisted hydrolysis of cyclic ureas: Transformation of 1-(pyridin-2-yl)-2,3,7,8-tetrahydro-1 H -imidazo[2,1- b ][1,3,5]triazepin-5(6 H )-ones into N 1 -[1-(pyridin-2-yl)imidazolidin-2-ylidene]-ethane-1,2-diamine ligands