Synthesis and stereochemistry of some novel dihydropyrrolo[3,4-c]pyrazoles |
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| Authors: | Ya?ar Dürüst Muhammet Y?ld?r?m Chris F Fronczek and Frank R Fronczek |
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| Institution: | (1) Department of Chemistry, Abant İzzet Baysal University, 14280 Bolu, Turkey;(2) Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803-1804, USA |
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| Abstract: | Abstract Eleven novel dihydropyrrolo3,4-c]pyrazole derivatives were obtained by the reaction of chiral (1R)-N-(1-phenylethyl)maleimide and C,N-aryl-substituted nitrilimines. The reaction afforded the cycloadducts as a regioisomeric
mixture which can be separable in some cases. The structure and stereochemistry of cycloadducts were assigned on the basis
of infrared (IR), 1H and 13C nuclear magnetic resonance (NMR), mass and X-ray spectra, optical rotation measurements, and CHN analyses. |
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