(3,5-Diphenyl-1-o-tolyl-1H-pyrrol-2-yl)phenylmethanone 3a and (1-naphthalen-1-yl-3,5-diphenyl-1H-pyrrol-2-yl)phenylmethanone 4a are atropisomeric and their LAH reductions afford mixtures of atropdiastereoisomeric (3,5-diphenyl-1-o-tolyl-1H-pyrrol-2-yl)-phenylmethanoles 3b,c and (1-naphthalen-1-yl-3,5-diphenyl-1H-pyrrol-2-yl)phenylmethanoles 4b,c, respectively.
R. Pohl, J. Pawlas, S. Bohm, R. Hrabal, H. Dvorakova and J. Kuthan, Mendeleev Commun., 1999, 9, 74 DOI: 10.1070/MC1999v009n02ABEH001069
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