A new chiral multidenate ligand (S, S)-1,7-bis(4-benzyloxazolin-2-yl-methyl)-1,7-diaza- 12-crown-4 1 has been synthesized and used as ligand in the copper catal
An improved method for preparation of 4-methyl-2-phenyl piperazine and is derivatives with higher yield and inexpensive reagents was developed,the products were