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N-(E)-2-Stilbenyloxymethylenecarbonyl substituted hydrazones of ortho, meta and para hydroxybenzaldehydes

Wyrzykiewicz E., Błaszczyk A., Turowska-Tyrk I.

Bulletin of the Polish Academy of Sciences. Chemistry

2000

Vol. 48, No. 3

213-229

Twelve unknown N-(E)-2-stilbenyloxymethylenecarbonyl substituted hydra-zones of acetone and ortho, meta and para hydroxybenzaldehydes have been prepared. The N-substituted hydrazones occur as E geometrical isomers and cis/trans amide conformers (1) H NMR estimations). Crystal structures of N-(E)-2-stilbenyloxymethylenecarbonyl sub-stituted hydrazone of ortho hydroxy-benzaldehyde 10 and N-(E)-2/-(4/-chlorostilbenyloxy-methylenecarbonyl)-substituted hydrazone of meta hydroxybenzaldehyde 14 have been determined as E geometrical isomers and trans amide conformers with intra- (10) and intermolecular (14) hydrogen bonds.

New isomeric N-substituted hydrazones of ortho, mata and para hydroxybenzaldehydes

Wyrzykiewicz E., Prukała D.

Polish Journal of Chemistry

1998

Vol. 72, nr 4

694-702

27 unknown N-(E)-stilbenyloxyalkylcarbonyl- and N-(E)-stilbenyloxyalkylcarbonylaminoalkylcarbonyl- substituted hydrazones of ortho, meta and para hydroxybenzaldehydes were prepared. From (1)H-NMR(inDMSO-d-6) was established that the N-substituted hydrazones occurred as E geometrical isomers and cis/trans amide conformers.