Synthesis, photobiological activity and photoreactivity of methyl-thieno-8-azacoumarins, novel bioisosters of psoralen
作者:Lisa Dalla Via、Sebastiano Marciani Magno、Paolo Rodighiero、Ornella Gia
DOI:10.1016/s0960-894x(02)00152-x
日期:2002.5
4,4'-dimethyl-thieno-8-azacoumarin (6) and 4,4',5'-trimethyl-thieno-8-azacoumarin (8) were synthesised. Their photobiological activity was tested on human tumour cell lines. Interestingly, for 6, a photocytotoxic ability higher in HL-60, comparable in HeLa cells, with respect to that of the well-known drug 8-methoxypsoralen (8-MOP), was demonstrated. The covalent photoaddition to DNA occurs by means of the molecular mechanism already demonstrated for furocoumarins. However, it is noteworthy that no skin phototoxicity appears.