Three diastereomers of 3,3′-di-t-butyl-1,1′-spirobi[benz[e]indan], (lS,3R,3′R)-(1a), (1S,3S,3′S)-(1b), and (1S,3R,3′S)-(1c), have been prepared; c.d. spectral evidence is presented for their different conformations.
S. Imajo, A. Nakamura, K. Shingu, A. Kato and M. Nakagawa, J. Chem. Soc., Chem. Commun., 1979, 868 DOI: 10.1039/C39790000868
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