Abstract: The present invention provides 4-Aza-2,3-didehydropodophyllotoxin compound of general formula A (4a-4z and 4aa-4ae) as useful potential antitumour agents against human cancer cell lines. The present invention further provides a process for the synthesis of 4-Aza-2,3-didehydropodophyllotoxin compounds (4a-4z and 4aa-4ae).

Abstract: The present invention provides compounds of general formula (3) as useful potential antitumour agents against human cancer cell lines. The present invention further provides a process for the synthesis of 4?-acrylamidopodophyllotoxin congeners of general formula (3), wherein R and R1 are an aryl group and R is selected from 3,4,5-trimethoxyphenyl or 2-methoxy phenyl and R1 is selected from the group consisting of 4-hydroxy-3-methoxyphenyl, 3-hydroxy-4-methoxyphenyl, 4-fluoro-3-methoxyphenyl, 3-fluoro-4-methoxyphenyl, 2-fluoro-5-methoxyphenyl, 2-fluoro-4-methoxyphenyl, 4-hydroxy-3-nitrophenyl, 4-methoxy-3-nitrophenyl, 4-nitrophenyl, 3-nitrophenyl, 2-nitro phenyl, 4-methoxyphenyl, 3-methoxyphenyl and 4-hydroxyphenyl.

Abstract: The present invention provides Chalcone linked Imidazolone compounds of formula A as anti cancer agent against fifty three human cancer cell lines.

Abstract: The present invention provides compounds of general formula (5a-d) and (9a-h) useful as potential antitumour agents against human cancer cell lines. The present invention also provides a process for the preparation of pyrrolo [2,1-c][1,4]benzodiazepine hybrids of general formula (5a-d) and (9a-h).

Abstract: The present invention provides novel ?-amino podophyllotoxin congeners of general formula (A); R=CH3, or H; R1=(a) or (b) or (c) or (d) or (e) or (f). The present invention also provides a process for the preparation of 4?-amino podophyllotoxin congeners useful as antitumour agents.

Abstract: A compound of general formula 9, useful as potential antitumour agents against human cancer cell line and a process for the preparation of Pyrrolo[2,1-c] [1,4]benzodiazepine-benzothiazole or benzoxazole conjugates linked through piperazine of general formula 9 wherein: R, R1=H, F, OCF3, Cl, OMe; R2=OCH3 or H; n1 n2=3, 4; x=S or O.

Abstract: The present invention provides the compounds of general formula 5 and 9 useful as potential antitumour agents against human cancer cell lines. The present invention further provides the process for preparation of napthalimide-benzimidazole hybrids of general formula 5 and 9, n-1-2, R=n-methylpiperazine or morpholine (Formula 9), wherein: n=2-3, m=2-3 and R=n-methylpiperazine or morpholine.

Abstract: The present invention provides a compounds of general formula (6), useful as potential antitumour agents against human cancer cell lines. The present invention further provides a process for the preparation of pyrrolo[2,1-c][1,4]benzodiazepine hybrids of general formula (6).

Abstract: The present invention provides synthesis and in vitro anticancer activity of novel pyrrolo[2,1-c][1,4]benzodiazepine derivatives with dithiocarbamate side chains. The present invention also relates to a process for the preparation of new pyrrolo[2,1-c][1,4]benzodiazepine derivatives with dithiocarbamate side chains of general formula (A) and a process for the preparation thereof.

Abstract: The present invention provides a compound of general formulae (8a-i), (11a-i), (14a-i), and (17a-i), useful as potential antitumour agents against human cancer cell lines. The present invention further provides a process for the preparation of Cinnamido-pyrrolo[2,1-c][1,4]benzodiazepines of general formulae (8a-i), (11a-i), (14a-i), and (17a-i).

Abstract: The present invention provides a compound of general formulae 5a-r, 9a-i to 13a-i and 17a-i to 22a-i, useful as potential antitumour agents against human cancer cell lines. The present invention further provides a process for the preparation of pyrrolo[2,1-c][1,4]benzodiazepine hybrids of general formulae 5a-r, 9a-i to 13a-i and 17a-i to 22a-i.

Abstract: The present invention provides novel ?-amino podophyllotoxin congeners of general formula (A); R?CH3, or H; R1=(a) or (b) or (c) or (d) or (e) or (f). The present invention also provides a process for the preparation of 4?-amino podophyllotoxin congeners useful as antitumour agents.

Abstract: The present invention provides a compounds of general formula (6), useful as potential antitumour agents against human cancer cell lines. The present invention further provides a process for the preparation of pyrrolo[2,1-c][1,4]benzodiazepine hybrids of general formula (6).

Abstract: The present invention provides the compounds of general formula 5 and 9 useful as potential antitumour agents against human cancer cell lines. The present invention further provides the process for preparation of napthalimide-benzimidazole hybrids of general formula 5 and 9, n-1-2, R=n-methylpiperazine or morpholine (Formula 9), wherein: n=2-3, m=2-3 and R=n-methylpiperazine or morpholine.

Abstract: The present invention provides new class of 4?-[4?-(1?,3?-benzothiazole-2?-yl)anilino]podophyllotoxin analogues having the structural formula as follows (4). Where R?H or CH3; R1?H, halogen, CH3 and R2?H, halogen, OCH3. The present invention also provides a process for the preparation of new 4?-[4?-(1?, 3?-benzothiazole-2?-yl)anilino]podophyllotoxin analogues as useful anticancer agents. More particularly, it provides a process for the preparation of 4?-[4?-(1?,3?-benzothiazole-2?-yl)anilino] derivatives of podophyllotoxin. The process for the synthesis of new podophyllotoxin analogues as anticancer agents produces the novel and stereo-selective derivatives of the podophyllotoxin in good yields, where in the key step for the synthesis of these analogues is by direct nucleophilic substitution of C-4?-iodo intermediates.

Abstract: The present invention provides compounds of general formula (5a-d) and (9a-h) useful as potential antitumour agents against human cancer cell lines. The present invention also provides a process for the preparation of pyrrolo [2,1-c][1,4]benzodiazepine hybrids of general formula (5a-d) and (9a-h).

Abstract: The present invention provides pyrrolo[2,1-c][1,4]benzodiazepine-glycoside prodrug of general formula 1a-b, useful as selective anticancer agents. The present invention also provides a process for the preparation of pyrrolo[2,1-c][1,4]benzodiazepine-glycoside prodrugs of general formula 1a-b. This invention also provides activation of these prodrugs by E.coli ? galactosidase and envisaged that these molecules are toxic to human cancer cell lines in the presence of the enzyme E.coli ?-galactosidase. The prodrugs 1a and 1b were also found to be toxic to human cancer HepG2 cells even in the absence of the E.coli ?-galactosidase. The toxic effect of the molecules when activated was similar to that of the parent molecules 6a and 6b, respectively.

Abstract: The present invention provides quinazolinone linked pyrrolo[2,1-c][1,4]benzodiazepine hybrid of general formula 5, wherein, R is alkyl or halo group selected from H, Cl, F or CH3 and n=1 to 3 useful for antitumour/anticancer activity. The present invention also provides a process for the preparation of quinazolinone linked pyrrolo[2,1-c][1,4]benzodiazepine hybrid general formula 5.

Abstract: The present invention provides a compound of general formula 5, useful as potential antitumour agents against human cancer cell lines. The present invention further provides a process for the preparation of pyrrolo[2,1-c][1,4]benzodiazepine hybrids of general formula 5 wherein, X1, X2, X3 is selected from H or Cl or CH3, Y is selected from O or NH, Z is selected from C?O or CH2 and n=1 to 4.

Abstract: The present invention provides novel pyrrolo[2,1-c][1,4]benzodiazepine-glycoside prodrug of general formula 1a-b, useful as selective anticancer agents. The present invention also provides a process for the preparation of novel pyrrolo[2,1-c][1,4]benzodiazepine-glycoside prodrugs of general formula 1a-b. This invention also provides activation of these produgs by E. coli ? galactosidase and envisaged that these molecules are toxic to human cancer cell lines in the presence of the enzyme E. coli ?-galactosidase. The prodrugs 1a and 1b were also found to be toxic to human cancer HepG2 cells even in the absence of the E. coli ?-galactosidase. The toxic effect of the molecules when activated was similar to that of the parent molecules 6a and 6b, respectively.