50361-91-6Relevant articles and documents
Rearrangement in the synthesis of annulated lactams starting from benzothiazines
Stalling, Timo,Saak, Wolfgang,Martens, Juergen
, p. 6291 - 6297 (2013)
The conversion of methoxyamides based on iminic 1,4-benzothiazines has led to three different products depending on the substitution pattern. On the one hand, different types of unknown lactam systems with and without a rearrangement under ring contraction of the benzothiazine substructure were selectively obtained. In this investigation, annulated lactams without ring contraction were formed by oxidation of the sulfide group to a sulfone group in the benzothiazine skeleton. On the other hand, benzothiazoles, which are oxidation products, were isolated. The structures of all types of lactams were verified by X-ray diffraction.