Synthesis and Reactivity of 1,1-Dihydro-2-oximino-3-aryl-3H-naphtho[2,1-b]pyrans
摘要:
A series of 1,1-dihydro-2-oximino-3-arylnaphtho[2,1-b]pyrans were synthesised in good yields by reduction of the corresponding 2-nitronaphthopyrans using Raney Nickel and hydrazine hydrate or sodium borohydride in ethanol. Further, the Beckmann rearrangement product on the oxime using phosphorous pentachloride in ether was identified as 1-cyanomethyl-2-naphthol. Whereas using sulfuric acid as the catalyst the product was characterised as 4-arylnaphth[1,2-0[1,4]oxazepine.
Synthesis and Reactivity of 1,1-Dihydro-2-oximino-3-aryl-3H-naphtho[2,1-b]pyrans
摘要:
A series of 1,1-dihydro-2-oximino-3-arylnaphtho[2,1-b]pyrans were synthesised in good yields by reduction of the corresponding 2-nitronaphthopyrans using Raney Nickel and hydrazine hydrate or sodium borohydride in ethanol. Further, the Beckmann rearrangement product on the oxime using phosphorous pentachloride in ether was identified as 1-cyanomethyl-2-naphthol. Whereas using sulfuric acid as the catalyst the product was characterised as 4-arylnaphth[1,2-0[1,4]oxazepine.