Atropisomerism in (+/-)-7-methyl- and -phenyl-substituted dinaphthophospholes and dinaphtharsoles

Article abstract of DOI:10.1016/0022-328X(93)80189-I

The reaction of 2,2'-dilithio-1,1'-binaphthyl with RECl2 (E = P or As; R = Me or Ph) affords the corresponding (+/-)-7-substituted dinaphtho<2,1-b; 1',2'-d>phospholes and dinaphth<2,1-b; 1',2'-d>arsoles.The molecules are fluxional on the NMR time scale wi