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 dichlorine monoxide 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
摘要 在 CC14 中,2-羟基萘甲素与一氧化二氯的配比以定量收率提供了稳定的 gem-二醇 - 3,3-二氯-2,3-二氢-2,2-二羟基-萘甲素。在 2-羟基-3-甲基-噻吩噻唑啉的情况下,形成相应的在 3 位单氯化的 2,3-二氢-3-甲基-2-氧萘扎林和 2,3-二氢-3-甲基-2 的混合物,发生 2-二羟基萘萨林。对于这些化合物,在某些条件下,观察到酮-偕二醇平衡。