Reactions of 2-methyl-3,1-benzoxazin-4-one with active methylene compounds: a new route to 3-substituted 4-hydroxyquinolin-2(1H)-ones
作者:Anastasia Detsi、Vassilios Bardakos、John Markopoulos、Olga Igglessi-Markopoulou
DOI:10.1039/p19960002909
日期:——
A new route to 3-substituted 4-hydroxyquinolin-2(1H)-ones, compounds of great biological importance, is described. The C-acylation of active methylene compounds 2 with the 2-methyl-3,1-benzoxazin-4-one 1, under basic conditions, leads to the formation of the new products 3–10, which have been isolated and characterized. Cyclization of the above intermediates furnishes the 3-substituted 4-hydroxyquinolin-2(1H)-ones. Spectral data and physical characteristics for all compounds are reported.
描述了一种合成生物学意义重大的3-取代4-羟基喹啉-2(1H)-酮的新路线。在碱性条件下,将活性甲烷基化合物2与2-甲基-3,1-苯并氧杂嗪-4-酮1进行C-酰化反应,可以生成新的产物3-10,这些产物已被分离和表征。上述中间体的环化反应生成3-取代4-羟基喹啉-2(1H)-酮。所有化合物的光谱数据和物理特性均已报告。