(5S*,6R*,7R*)-6-Formyl-5-phenyl-7-propylperhydropyrazolo[1,2-a]pyrazol-1-one

Abstract

The title compound, C16H20N2O2, was obtained by catalytic asymmetric cycloaddition of trans-3-propylacrolein with 1-benzylidenepyrazolid-3-one betaine. There are two symmetry-independent molecules in the asymmetric unit. In both molecules, the two five-membered heterocyclic rings adopt envelope conformations.