Acta Cryst. (2001). E57, o1255-o1257  [ doi:10.1107/S1600536801019559 ]

(4R,5R)-2-(N-Methyl-benzylamino)-3-nitro-4-(1',2',3',4',5'-penta-O-acetyl-D-manno-pentitol-1-yl)-5-phenyl-5-phenylcarbamoyl-4,5-dihydrothiophene at 150  K

M. J. Diánez, M. D. Estrada, A. López-Castro and S. Pérez-Garrido

Abstract: The crystal structure of the title compound, C₄₀H₄₃N₃O₁₃S, has been determined at room temperature and at 150  K. From the cycloaddition of thioisomünchnones with chiral nitroalkenes, two diastereomeric dihydrothiophenes were obtained, showing that regiospecificity and facial selectivity were involved in these cycloadditions reactions where only one of the two diastereomeric dihydrothiophenes could be isolated in the solid state. The chiralities of the two new centres at C4 and C5, determined with respect to that known at C6 are R,R. N-HO hydrogen bonds join the molecules in chains running along the c axis.

Online 30 November 2001

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