Synthesis of novel hetero ring fused pyridine derivatives; Their anticancer activity, CoMFA and CoMSIA studies. Issue 13 (15th July 2018) - Santhosh Kumar, G.
Graphical abstract: A series of novel furo[2, 3- b ]pyridine-2-carboxamide 4a –h /pyrido[3′, 2′:4, 5]furo[3, 2- d ] pyrimidin-4(3 H )-one 5a –p, furo [2, 3- b ] pyridine-2-carbohydrazide Schiff's base 7a –h and pyrido [3′, 2′:4, 5] furo[3, 2- d ] pyrimidin-4(3 H )-one derivatives 8a –h were prepared. All the final products 4a –h, 5a –p, 7a –h and 8a –h were screened against four human cancer cell lines (HeLa, COLO205, HepG2 and MCF7) and one normal cell line (HEK293). Compounds 4e, 4f, 4g, 5h, 7c, 7d, 7e and 7f showed significant anticancer activity against all the cell lines at micro molar concentration and found to be non-toxic to normal cell line. Further studied for HeLa, COLO205 and MCF-7 using CoMFA and CoMSIA. Models obtained from 3D-QSAR studies provided a strong basis for future rational design of more active and selective HeLa, COLO205 and MCF-7 cell line inhibitors. Highlights: Novel hetero ring fused pyridine derivatives. All products screened against four human cancer cell lines and one normal cell line. Compounds 4e, 4f, 4g, 5h, 7c, 7d, 7e and 7f showed promising anticancer activity. All compounds found to be non-toxic to normal cell line. Abstract: A series of novel furo[2, 3- b ]pyridine-2-carboxamide 4a –h /pyrido[3′, 2′:4, 5]furo[3, 2- d ] pyrimidin-4(3 H )-one derivatives 5a –p were prepared from pyridin 2(1 H ) one 1 via selective O-alkylation with α-bromoethylester followed by cyclization, then reaction with different aliphatic primary amines to obtain 4 and further reaction with triethyl orthoacetate/triethyl orthoformate. Also prepared novel furo[2, 3- b ]pyridine-2-carbohydrazide Schiff's bases 7a –h and pyrido [3′, 2′:4, 5]furo[3, 2- d ]pyrimidin-4(3 H )-one derivatives 8a –h starting from furo[2, 3- b ]pyridine carboxylate derivatives 3 by reaction with hydrazine hydrate to form 6 and reaction with diverse substituted aldehydes and cyclization. Products 4a –h, 5a –p, 7a –h and 8a –h were screened against four human cancer cell lines (HeLa, COLO205, Hep G2 and MCF 7) and one normal cell line (HEK 293). Compounds 4e, 4f, 4g, 5h, 7c, 7d, 7e and 7f showed significant anticancer activity against all the cell lines at micro molar concentration and found to be non-toxic to normal cell line. Studies for HeLa, COLO205 and MCF-7 using CoMFA and CoMSIA. Models from 3D-QSAR provided a strong basis for future rational design of more active and selective HeLa, COLO205 and MCF-7 cell line inhibitors.