Eine Verallgemeinerung der Hamiltonschen Gruppen

Ohne Zusammenfassung     

Notiz zu meiner Arbeit über Hamiltonsche Gruppen

Ohne ZusammenfassungMath. Ann. Bd. 59, S. 187.     

Dreidimensionale wirbelgefaserte Räume

Ohne Zusammenfassung     

Zur Bestimmung des spezifischen Gewichts staubf?rmiger Substanzen

Ohne Zusammenfassung     

Lampen und Erhitzungsvorrichtungen

Ohne Zusammenfassung     

Eine Verallgemeinerung des Additionstheoremes der Bessel'schen Functionen erster Art

Ohne Zusammenfassung     

Regiochemistry of addition of aminoheterocycles to α-cyanocinnamonitriles: formation of aza-bridged bi- and tricycles

The additions of various five-membered ring aminoheterocycles to α-cyanocinnamonitriles were studied. Regiochemistry of product formation can in most cases be controlled by choosing the appropriate electrophile. An α-cyanocinnamonitrile with an additional β-leaving group normally provides products arising from initial attack of the ring amino group, while exo attack predominates in the case of the parent α-cyanocinnamonitrile. Aminopyrazole and aminoindazole provide only exo products with either electrophile. Product assignments were made via X-ray and 2D NMR methods; these assignments serve as a benchmark to several literature references and to future investigations of conjugate additions of these nucleophiles.