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Paper | Regular issue | Vol 26, No. 12, 1987, pp.3203-3209
Published online, 1st January, 1970
DOI: 10.3987/R-1987-12-3203
Stereochemistry of Diastereomeric 9,10-Dimethoxy-1,3,4,6,7,11b-hexahydrospiro[banzo[a]quinolizin-2,5‘-imidazolidine]-2‘,4‘-diones

J. Carlos Meréndez and Mónica M. Söllhuber

*Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain


The structures of the two diastereomeric title compounds obtained by the Bucherer-Bergs and Read procedures are respectively assigned to α and β isomers on the basis of 1H -nmr, 13C-nmr and chemical reactivity data. Both compounds present a predominant trans conformation as shown by ir, 1H-nmr and 13C-nmr data.