The bromine-lithium exchange sequence upon interaction of 2,4,5,7-tetrabromo-1,8-bis(dimethylamino)naphthalene with n-BuLi was studied. Experimental results were explained by means of quantum chemical calculations. It was demonstrated that the first exchange occurs in position 4 due to the significant decrease of a steric strain of the molecule. The second exchange takes place in either position 5 or 7 due to the even more negative charge distribution in the naphthalene core. As a result, the third exchange leads to the species containing lithium in positions 2,4,5 or 2,4,7. Using a large excess of n-BuLi in hexane, 2,4,5,7-tetralithio-1,8-bis(dimethylamino)naphthalene was successfully prepared. The latter was used for the synthesis of several tetrasubstituted derivatives of 1,8-bis(dimethylamino)naphthalene by quenching with different electrophiles.
Original languageEnglish
Pages (from-to)3627-3636
Number of pages10
JournalOrganometallics
Volume40
Issue number21
Early online date25 Oct 2021
DOIs
StatePublished - 8 Nov 2021

    Research areas

  • BOND, ENERGIES, ORGANOLITHIUM COMPOUNDS, PERI-NAPHTHYLENEDIAMINES, SPONGE, WAVE-FUNCTION

    Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

ID: 87508679