73153-48-7Relevant articles and documents
Synthesis of 4H-1,4-Benzothiazines via Lithiation Alpha to Sulphur of 2-Acylaminophenyl Alkyl Sulphides, Sulphoxides, and Sulphones
Babudri, Francesco,Florio, Saverio,Vitrani, Anna Maria,Nunno, Leonardo Di
, p. 1899 - 1903 (2007/10/02)
4H-1,4-Benzothiazines, their monoxides, and their dioxides are readily prepared via lithiation and intramolecular cyclisation of 2-acylaminophenyl alkyl sulphides, sulphoxides, and sulphones with lithium di-isopropylamide in tetrahydrofuran at -50 deg C.
Radical Pair Mechanism in the Aromatic Rearrangement of O-Alkylsulfinyl-N-phenylhydroxylamines
Heesing, Albert,Kleine Homann, Walter,Muellers, Wolfgang
, p. 152 - 164 (2007/10/02)
O-Alkylsulfinyl-N-benzoyl-N-phenylhydroxylamines (3) rearrange at -70 degC to give sulfonamides 4, o-sulfones 5, p-sulfones 6, and o-sulfonates 7.These reactions proceed intramolecularly via the radical pair 13 by -, - and -shifts in both radicals as proved both by experiments with 18O-indicated N-benzoyl-N-phenylhydroxylamine (1) and by strong 13C-CIDNP effects.The third oxygen in the o-sulfonate 7 is donated by a second molecule of the educt 1.