title: Chemoselective deprotonative lithiation of azobenzenes: reactions and mechanisms.
abstract: Whereas standard strong bases (n-BuLi, s-BuLi/TMEDA, n-BuLi/t-BuOK, TMPMgCl·LiCl, and LDA) reduce the N═N bond of the parent azobenzene (Y = H), aromatic H→Li permutation occurs with LTMP when a suitable director of lithiation (Y = OMe, CONEt2, F) is present in the benzene residue of the azo compound. The method allows direct access to new substituted azobenzenes.
authors.affiliation: Institut des Molécules et Matériaux du Mans, Faculté des Sciences et Techniques, Université du Maine and CNRS UMR 6283 , Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France.
authors.forename: Thi Thanh Thuy
authors.initials: TT
authors.lastname: Nguyen
authors.forename: Anne
authors.initials: A
authors.lastname: Boussonnière
authors.forename: Estelle
authors.initials: E
authors.lastname: Banaszak
authors.forename: Anne-Sophie
authors.initials: AS
authors.lastname: Castanet
authors.forename: Kim Phi Phung
authors.initials: KP
authors.lastname: Nguyen
authors.forename: Jacques
authors.initials: J
authors.lastname: Mortier