Add time:08/10/2019         Source:sciencedirect.com

Cycloadditions of (1Z,4R*,5R*)-4-benzoylamino-5-phenylpyrazolidin-3-on-1-azomethine imines to olefinic dipolarophiles were studied. Stereochemistry of cycloadditions to azomethine imines 3 was found to be controlled by stereodirecting phenyl group at position 3, as well as by the ortho-substituents at the aromatic ring at position 1′. The structures of dipoles and products were confirmed by NMR and X-ray diffraction.

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