A concise and efficient method for the synthesis of 7-hydroxy-6H-naphtho[2,3-c]coumarin using available 1-(2-hydroxyphenyl)-2-phenylethanone and Meldrum's acid has been developed. This transformation involved a tandem aldol reaction/lactonization/Friedel–Crafts reaction to form a lactone ring and a benzene ring. It showed high atom economy with water and acetone as the byproducts. Mechanism studies
已经开发出使用可用的1-(2-羟基苯基)-2-苯基乙酮和Meldrum酸合成7-羟基-6 H-萘[2,3- c ]香豆素的简洁有效的方法。这种转化涉及串联的羟醛反应/内酯化/弗里德-克来福特反应,形成内酯环和苯环。以水和丙酮为副产物显示出高原子经济性。机理研究证明了Meldrum酸的两个作用:(i)作为串联反应的试剂,以及(ii)作为Friedel-Crafts反应的催化剂。此外,7-羟基-6 H-萘[2,3- c]香豆素进一步通过芳基乙炔基,芳基,和氰基基团,得到d-π-A的化合物具有优良的荧光发射(有效地官能化Φ ˚F = 0.14-0.78)。