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Racemic 2,2′-bis[diarylstibano]-1,1′-binaphthyls [(±)-BINASbs] and 2,2′-bis[di(p-tolyl)bismuthano]-1,1′-binaphthyl [(±)-BINABi], which are the antimony and bismuth congeners of BINAP, have been prepared from 2,2′-dibromo-1,1′-binaphthyl (DBBN) via 2,2′-dilithio-1,1′-binaphthyl intermediate by treatment with the appropriate metal halides [(p-Tol) 2 SbBr, Ph 2 SbBr and (p-Tol) 2...
7-Substituted dinaphtho[2,1-b;1′,2′-d]-siloles 2 and -germoles 3, involving the first isolated example of optically active group 14 dinaphthoheteroles, have been prepared from 2,2′-dibromo-1,1′-binaphthyl (DBBN) via 2,2′-dilithio-1,1′-binaphthyl intermediate. They are fluxional in the NMR time scale at elevated temperatures, and the energy barriers (ΔG‡) for racemization arising from the flipping...
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