Intramolecular hydrogen bonding in 1,8-bis(dimethylamino)naphthalenes containing two to four heteroatomic functions in the ortho- and peri-positions: from CD3 to sulfur and selenium

Using 4,5-dibromo- and 2,7-dibromo-4,5-dimethyl-derivatives of 1,8-bis(dimethylamino)naphthalene (naphthalene “proton sponge”) in bromine-lithium exchange and subsequent reactions with appropriate electrophiles, a set of intriguing new derivatives with such functionalities as Br, Me,...