Selective Chlorination of Hydroxynaphthazarins with Dichlorine Monoxide. Remarkable Stability of some Geminal Diols Derived from 2,3-Dihydro-2-oxonaphthazarin
作者:Alla Ya. Tchizhova、Victor Ph. Anufriev、Valery P. Glazunov、Vladimir A. Denisenko、Olga P. Moiseenko
DOI:10.1080/00397919908085917
日期:1999.11
Abstract The ration of 2-hydroxynaphthazarins with dichlorinemonoxide in CC14 affords the stable gem-diols - 3,3-dichloro-2,3-dihydro-2,2-dihydroxy-paphthazarins in quantitative yields. In the case of 2-hydroxy-3-methyl-iiaphthazarins the formation of the mixture of corresponding monochlorinated at 3 position 2,3-dihydro-3-methyl-2-oxonaphthazarins and 2,3-dihydro-3-methyl-2,2-dihydroxynaphthazarins
作者:A. Ya. Chizhova、T. Yu. Kochergina、V. F. Anufriev、V. A. Denisenko、V. P. Glazunov
DOI:10.1007/bf02494641
日期:1999.5
The 7,7′-dideoxy analog of islandoquinone, binaphthazarin of a new structural type, bearing a 2-oxo-2,3-dihydro-1,4-naphthoquinone moiety was synthesized. The carbonyl group at the C(2) atom of this binaphthazarin easily adds water to give the correspondinggem-diol. Comparison of the spectral characteristics of the prepared diol and islandoquinone made it possible to elucidate more precisely the structure