Reactions of Anthrone with Nontransitionmetal and Transitionmetal Amides and Thiolates

Abstract

The reactions of anthrone with group 5B metal amides (R₂N)₃M(M=As and Sb) at 140°C for several days afforded the substitution products: bis(9-anthryloxy)(dialkylamino)arsine and -stibine. On the other hand, group 4B metal amides (R₂N)₄M(M=Si, Ge and Sn)reacted with anthrone to give 9-(dialkylarnino)anthracene along with the substitution products: bis(9-anthryloxy)bis(dialkylamino)metals. Transition metal amides of group 4 (Ti and Zr) and 5 (V and Nb) reacted with anthrone to give only 9-(dialkylamino)anthracene. The reaction of tetrakis(alkylthio)silane and -stanane with anthrone gave both 9-(alkylthio)anthracene and anthracene, whereas tris(alkylthio)arsine and -stibine gave anthracene only. Possible reaction mechanisms were proposed.