ISSN:
1434-4475
Schlagwort(e):
Heterocyclizations
;
1 H-NMR-Spectroscopy
;
Iso(thio)cyanates
;
Malonates
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract The reaction of diethyl bromomalonate (1) or diethyl diazomalonate (6) with benzoyl isothiocyanate (2) proceeds via the carbene intermediates4, 7 or12 to afford the 1,3-dithiole5, the Δ2-oxazoline8 or the 1,3-oxathioles9 depending upon the catalyst employed. In contrast, the bis(ethoxycarbonyl)methylpyridinium bromides14 upon treatment with benzoyl isocyanates15 in pyridine give rise to vinylene dipyridinium dibromides18.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00899255
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