NDLI: Synthese und Reaktivität von 2- und 3-hydroxylierten Dihydro-1,4-Benzoxazinen

Content Provider	Semantic Scholar
Author	Bartsch, Herbert Kropp, Wolfgang Pailer, Matthias
Copyright Year	1979
Abstract	Abstract2 can be pyrrolized to yield3 a, which in turn may be hydrolyzed with HCl to3 b. Acetylation of3 a followed by a reaction with trifluoroacetic acid (TFA) gives3 e. Elimination of ethanol from3 a or of water from3 e is not possible. Treatment of1 a with pyridine/acetic anhydride andTFA or with acetic acid/acetic anhydride affords4 a and4 b, resp. Reaction of4 b in benzene/p-toluenesulfonic acid for 2 hours yields both ethers5I and5II, whereas after 6 hours 4-acetyl-4H-1,4-benzoxazine (6) is obtained. The structures of all products are established by chemical and spectroscopic methods.
Starting Page	267
Ending Page	278
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1007/BF00911914
Volume Number	110
Alternate Webpage(s)	https://page-one.springer.com/pdf/preview/10.1007/BF00911914
Alternate Webpage(s)	https://doi.org/10.1007/BF00911914
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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