Direct synthesis of 3-(diaminomethylidene)chromane-2,4-diones from 3-formylchromones and hydroxylamine
作者:V. Ya. Sosnovskikh、V. S. Moshkin
DOI:10.1007/s11172-010-0205-1
日期:2010.5
Abstract3-(Diaminomethylidene)chromane-2,4-diones were synthesized from 4-oxo-4H-chromene-3-carbaldehyde and hydroxylamine in the presence of sodium hydroxide without isolation of intermediate products. Reflux of 3-(diaminomethylidene)chromane-2,4-dione in acetic anhydride gives rise to their monoacetyl derivatives at one of the amino groups.
摘要 以 4-oxo-4H-chromene-3-carbaldehyde 和羟胺为原料,在氢氧化钠存在下合成了 3-(Diaminomethylidene)chromane-2,4-diones,不需分离中间产物。3-(二氨基亚甲基) chromane-2,4-dione 在乙酸酐中的回流会在其中一个氨基上产生它们的单乙酰衍生物。