The reaction of ethyl 2-(2-oxo-3-indolinylidene)-2-hydroxyacetate with propionic anhydride and pyridine
作者:M. Alam、J. A. Ballantine
DOI:10.1039/j39680000255
日期:——
The condensation of ethyl 2-(2-oxo-3-indolinylidene)-2-hydroxyacetate (III) with propionic anhydride in the presence of pyridine results in the production of an insoluble red-brown pigment which has been characterised as 3,4-dimethyl-2,5-di-(2-oxo-N-propionyl-3-indolinylidene)-2,5-dihydrofuran (V). A possible mode of formation of the pigment is discussed.
在吡啶存在下,2-(2-氧代-3-吲哚基亚烷基)-2-羟基乙酸乙酯(III)与丙酸酐的缩合导致生成不溶性红棕色颜料,其特征为3,4-二甲基-2,5-二-(2-氧代-N-丙酰基-3-吲哚基亚烷基)-2,5-二氢呋喃(V)。讨论了颜料形成的可能方式。