- Synthesis and antitumor activities of a new series of 4,5-dihydro-1H- thiochromeno[4,3-d]pyrimidine derivatives
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A new series of 4,5-dihydro-1H-thiochromeno[4,3-d ]pyrimidine derivatives have been designed and synthesized. The antitumor activities of the target compounds have been evaluated in vitro against two human cancer cell lines including A549 (human alveolar adenocarcinoma cell) and H460 (human lung cancer) by MTT assay. Most of the target compounds exhibited significant antitumor activities against A549 and H460 cancer cell lines. The most potent compound 4-(benzo[d][1,3]dioxol-5-yl)-8,9-difluoro-2-(4-methylpiperazin-1-yl)-4, 5-dihydro-1H-thiochromeno[4,3-d]pyrimidine (CH05) (IC50 = 0.44 μM, 3.07 μM) was 2.0 and 8.4 times more active than gefitinib (IC50 = 0.89 μM, 16.81 μM) against A549 and H460 cell lines, respectively.
- Guo, Dexiang,Liu, Yajing,Li, Ting,Wang, Nan,Zhai, Xin,Hu, Chun,Gong, Ping
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experimental part
p. 347 - 351
(2012/08/08)
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- A novel, facile methodology for the synthesis of N,N′-bis(tert-butoxycarbonyl)-protected guanidines using polymer-supported carbodiimide
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A novel methodology for the synthesis of guanidines from amines has been developed using polymer assisted synthesis, potentially allowing the preparation of series of compounds in a high throughput manner. The methodology comprises the use of polymer-supported carbodiimide as the activating agent for N,N′-bis(tert-butoxycarbonyl) thiourea with polymer-supported trisamine as a scavenger, followed by deprotection with trifluoroacetic acid. For the first time, polymer-supported carbodiimide has been utilized as an activating agent to synthesize guanidines.
- Guisado, Olga,Martínez, Sonia,Pastor, Joaquín
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p. 7105 - 7109
(2007/10/03)
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