Nitrones and oxaziridines. XII. Vinylogous hydroxamic acid structures of the reduction products from γ-nitro (o- and p-hydroxyphenyl) ketones

Vinylogous hydroxamic acid structures (4) and (5) are assigned to the products of the zinc and ammonium chloride reduction of the γ-nitro (o- and p-hydroxyphenyl) ketones (lc) and (1d) respectively. Similar reduction of the related γ-nitro (m-hydroxyphenyl) ketone (le) afforded the nitrone (2e).