Synthesis and study of cytotoxic potency of novel coumarin derivatives against breast cancer cell line

New series of coumarin derivatives was synthesized and evaluated as antitumor agents against breast cancer in human cell line [MCF 7]. The key compound 8-acetyl-7-hydroxy-4-methyl coumarin [1] was synthesized and condensed with phenyl hydrazine to form the hydrazone derivative 2. Also, 1 condensed with different alkylating agents to give the corresponding sulphonyl derivatives 3a, b which further condensed with 2,4-dinitrophenyihydrazine to give the corresponding hydrazones 4a,b. One pot reaction of 5 with different aldehydes, ethylcyanoacetate and ammoniumacetate gave pyridone derivatives 6a-e. Also. compound 5 condensed with different aldehydes then cyclized to give the pyrazoline derivatives 9a,b and 10a,b. While, on condensation of 5 with thiosemicarbazide derivatives followed by cyclization the resulting product, gave the oxathiazoline 12 and thiazolidine 13. Some of these newly synthesized compounds showed noderate activity against breast carcinoma cell line[MCF7] in human

Synthesis of novel coumarin derivatives bearing heterocyclic substituents for chemoprophylactic evaluation

A series of coumarin derivatives bearing heterocyclic substituents was synthesized. Bromination of the key compound 8-acetyl-7-hydroxy-4-methylcoumarin [I] under varied conditions gave the brominated derivatives II, III and IV, Conversions of III by several cyclocondensations gave the corresponding thiazole V, quinoxaline VI, quinoxalinone VIII and furanone IX derivatives. Also, methylation and cyclocondensation of the methylene-active acetyl groups of II with several aldehydes gave the corresponding pyridone various amines gave the corresponding amino side chains. Some of these newly synthesized products were studied for their chemoprophylatic effect on Schistosoma mansoni infected mice. Compound Xc a showed moderate effect

Synthesis and chemoprophylactic effect of novel coumarin derivatives

A series of coumarin derivatives carrying different biologically active side chains and heterocyclic substituents were synthesized from 8-acetyl-4-methyl-7-hydroxycoumarin. Among these side chains are alkylamino, semicarbazono- and N[4]-substituted thiosemicarbazonoethyl, I-hydrazonoethyl and substituted I-hydroximinoethyl groups, while heterocyclic substituents were derived from pyran, oxadiazole, thiadiazole and thiazolidinone rings. Also, some derivatives of pyrano [2,3-h]chromen-9-carbaldehyde were synthesized. Some of these new products were studied for their chemoprophylactic effect in Schistosoma mansoni infected mice