Two pyrazine derivatives [fructosazine (3) and deoxyfructosazine (6)] were simultaneously formed in a solution of D-glucosamine hydrochloride under various conditions. They showed deoxyribonucleic acid (DNA) strand breakage activity in plasmid pBR322 comparable to that of D-glucosamine. The DNA strand breakage by fructosazine (3) was stimulated by Cu2+.

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Die Kondensation von o‐Aminophenol (I) mit Cyclohexandionen (II) liefert die Phenothiazinonderivate (III).

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2-Acetamidopyridines are oxidized with peracetic acid to the corresponding 1-oxides. Upon hydrolysis 2-aminopyridine 1-oxides are formed.2-Aminopyridine 1-oxide (I) has previously been prepared by the following steps: 2-picolinic acid, 2picolinic acid 1-oxide, methyl 2-picolinate 1-oxide, 2-picolinic acid amide 1-oxide, 2-aminopyridine 1oxide.2

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