r-5-(?-Halogenbenzyl)-3,t-4-diaryl-c-4-hydroxy-oxazolidin-2-one als Ringtautomere von ?-(Arylaminocarbonyloxy)-?-halogen-dihydrochalkonen
- Resource Type
- Authors
- Martina Schumann; Hubert Köppel; Andrea Friede; Manfred Michalik; Reiner Radeglia; Fritz Gerd Weber
- Source
- Journal f�r Praktische Chemie/Chemiker-Zeitung. 336:509-513
- Subject
- Chalcone
chemistry.chemical_compound
chemistry
Stereochemistry
Ring (chemistry)
Spectroscopy
Tautomer
- Language
- ISSN
- 1521-3897
0941-1216
r-5-(α-Halogenobenzyl)-3, t-4-diaryl-c-4-hydroxy-oxazolidin-2-ones as Ring Tautomers of α-(N-Arylaminocarbonyloxy)-β-halogeno-dihydrochalcones The reaction of chalcone halogenohydrins (1–3) with arylisocyanates does not stop at the stage of the α-arylaminocarbonyloxy-β-halogeno-dihydrochalcones (7), but the cyclic urethanes 4–6 are formed. Compound 7h was synthesized independently. The structure and stereochemistry of 4–6 and 7h were determined by 13C n.m.r. spectroscopy.