Synthesis and characterization of novel 1H,3H-Naphth[1,8-cd][1,2,6] oxadiborins.

The preparation of 1,3-dimethoxy, -dichloro, and -dimethyl- 1H,3H-naphth [1,8-cd][1,2,6]oxadiborin is described. These substances were obtained via facile substitution reactions starting from 1,8-naphthalenediboronic anhydride. The dimethyl compound resisted attempts at breaking the B-O-B linkage, but formed complexes with nitrogen bases. The other derivatives are potential intermediates in the synthesis of rigid oligoboron Lewis acids.