2002
DOI: 10.1016/s0223-5234(02)01416-2
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Synthesis and primary cytotoxicity evaluation of new 5-nitroindole-2,3-dione derivatives

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Cited by 68 publications
(40 citation statements)
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“…The infrared (IR) spectra of 5a-o showed absorption bands in the 3375-3051, 1737-1684, 1620-1599 and 1193-1149 cm -1 regions attributed to NH, C=O, C=N and C=S functions, respectively. 22,56,57 The proton nuclear magnetic resonance ( 1 H NMR) spectra displayed two separate singlets at δ 7.50-11.36 and 10.84-12.75 for indole NH and thiosemicarbazone N 2 -H. The thiosemicarbazone N 4 -H appeared as a triplet at δ 8.03-10.91 in all the cases, 22,27 except 5e, 5g and 5h, wherein it resonated as a singlet at δ 8.26, 10.91 and 10.85, respectively. Similarly, the benzyl CH 2 protons were observed as a doublet at δ 4.40-5.02 in all the cases, 22,27 except 5b, 5g and 5h; in the case of 5h they appeared as a singlet at δ 3.79, whilst in 5b and 5g they resonated together with the DMSO and DMSO, CH 3 group protons, respectively.…”
Section: Chemistry Of Compounds 5a-omentioning
confidence: 99%
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“…The infrared (IR) spectra of 5a-o showed absorption bands in the 3375-3051, 1737-1684, 1620-1599 and 1193-1149 cm -1 regions attributed to NH, C=O, C=N and C=S functions, respectively. 22,56,57 The proton nuclear magnetic resonance ( 1 H NMR) spectra displayed two separate singlets at δ 7.50-11.36 and 10.84-12.75 for indole NH and thiosemicarbazone N 2 -H. The thiosemicarbazone N 4 -H appeared as a triplet at δ 8.03-10.91 in all the cases, 22,27 except 5e, 5g and 5h, wherein it resonated as a singlet at δ 8.26, 10.91 and 10.85, respectively. Similarly, the benzyl CH 2 protons were observed as a doublet at δ 4.40-5.02 in all the cases, 22,27 except 5b, 5g and 5h; in the case of 5h they appeared as a singlet at δ 3.79, whilst in 5b and 5g they resonated together with the DMSO and DMSO, CH 3 group protons, respectively.…”
Section: Chemistry Of Compounds 5a-omentioning
confidence: 99%
“…The main fragmentation path engaged the split of endocyclic NH-CO and exocyclic NH-CS, N-N bonds. 57 The proposed fragmentation pattern of 5i is depicted in Figure S1.…”
Section: Chemistry Of Compounds 5a-omentioning
confidence: 99%
“…29 Primary cytotoxicity evaluation of a series of 5-nitroindole-2,3-dione-3-thiosemicarbazone derivatives has indicated that these compounds could also act as potential new anticancer agents, since they reduced the growth of different human tumor cell lines to ≤ 32%. 30 Additionally, indole and isatin oximes can be easily prepared and are widely used as precursors in fine organic synthesis, leading to many different products, such as amine-, ether-, nitrile-, and oxazole-derivatives, 31 which were also proposed as therapeutic agents for coronary and ischemic heart disease, cardiac arrhythmia and hypertension, 32 and as antidepressants. 33 …”
Section: Oxindoles and Their Biological Activitiesmentioning
confidence: 99%
“…Investigation of the structure-activity relationships in 3-substituted 2-indolinone derivatives revealed that halogenation at the 5-position and 3-thiosemicarbazone formation were associated with increased activity against a range of human cancer cell lines, various bacteria and viruses (6)(7)(8)(9)(10). Selective activity toward multidrug resistant (MDR) cells of several thiosemicarbazone derivatives were recently tested.…”
Section: Introductionmentioning
confidence: 99%