Pharmacologically active 4-oxo-4H-chromen-2-carboxylic acids (2-carboxychromones). Part I. The synthesis of 4-oxo-4H-chromen-2-carboxylic acids containing a fused thiazole ring
作者:A. O. Fitton、B. T. Hatton、M. P. Ward、R. Lewis
DOI:10.1039/j39700001553
日期:——
The synthesis of five 2-carboxychromones containing a fused 2-methylthiazole ring is described. All were obtained from appropriately substituted acetylhydroxybenzothiazoles which were synthesised by several routes but mainly by acetylation of methoxybenzothiazoles under various conditions. A note on the mass spectral fragmentation of the 2-methylthiazolochromone acids is included.
描述了五个含有稠合的2-甲基噻唑环的2-羧基色酮的合成。所有这些均得自适当取代的乙酰基羟基苯并噻唑,它们是通过几种途径合成的,但主要是通过在各种条件下将甲氧基苯并噻唑进行乙酰化而合成的。包括有关2-甲基噻唑并色酮酸的质谱裂解的注释。