Abstract
Recrystallization of the spiro-pyrrolidinium salts (S)-1-(hydroxydiphenyl methyl)-5-azoniaspiro[4.4]nonane bromide or (S)-1-(hydroxydiphenylmethyl)-5-azoniaspiro[4.5] decane bromide from chloroform afforded a crystalline spiro-pyrrolidinium salt including two molecules of chloroform which was determined by 'H nmr elemental analysis, and X-ray analysis. Racemic 2.2′-dihydroxy-1, 1′-binaphthyl and 10, 10′-dihydroxy-9,9′-biphenanthryl have been resolved effectively by inclusion crystallization using these chiral ammonium salts.
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Shi, M., Itoh, N., Masaki, Y. et al. An interesting inclusion phenomenon with (S)-1-(hydroxydiphenylmethyl)-5-azoniaspiro[4.4]nonane bromide and (S)-1-(hydroxydiphenylmethyl)-5-azoniaspiro[4.5]decane bromide and optical resolution of binaphthyl and biphenanthyl diols by inclusion crystallization with these optically active ammonium salts. J Chem Crystallogr 26, 445–449 (1996). https://doi.org/10.1007/BF01668302
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DOI: https://doi.org/10.1007/BF01668302