Exploring phosphorus substitution in chromeno[4,3-d]pyrido[1,2-a]pyrimidines: new insights into Topoisomerase 1 inhibition and cytotoxicity.
Phosphorylated chromeno[4,3-d]pyrido[1,2-a]pyrimidines were synthesized from functionalized 2-aminopyridines and evaluated as novel inhibitors of human DNA topoisomerase 1. Several compounds demonstrated potent enzymatic inhibition, and notable derivatives such as 8b and 10a exhibited selective antiproliferative activi...