抄録
Synthesis and thermal-reaction of 4-isoxazolines were investigated. Reaction of 3-unsubstituted isoxazolium salts with sodium borohydride yielded the corresponding 4-isoxazolines and their borane complexes together with β-hydroxyaminopropiophenone derivatives. Analogous reaction of 5-unsubstituted isoxazolium salt yielded two isomeric products, 4- and 3-isoxazoline derivatives. The 3-isoxazoline derivative underwent further reduction to give isoxazolidine derivatives. Thermal-conversion of some 4-isoxazolines and their borane complexes into 2-acylaziridine derivatives is also reported.
