Synthesis and in vitro and in vivo antitumor/anticancer activity of novel O-Mannich bases of 4,6-diaryl-3,4-dihydropyrimidine-2(1H)-ones
作者:K. Venkateshwarlu、G. Chakradar Rao、V. M. Reddy、Y. Narasimha Reddy
DOI:10.1007/s13738-014-0438-2
日期:2014.12
A new series of [4,6 substituted diaryl-1,6-dihydropyrimidin-2-yl-oxymethyl]-amines 5a–o have been synthesized by the Mannich condensation on the respective 4,6-diaryl-3,4-dihydropyrimidine-2(1H)-ones 4, in basic medium using formaldehyde along with three secondary amines, viz., dimethylamine, piperidine and morpholine. The dihydropyrimidinones 4 in turn were synthesized by the cyclocondensation of chalcones 3 with urea. Alternatively, compounds 4 were also prepared directly by one-pot 3-component cyclocondensation reaction starting from acetophenone, benzaldehyde and urea. The structures of all the newly synthesized compounds have been confirmed by their spectral and analytical data. All the O-Mannich bases 5 have been evaluated for their in vitro cytotoxic and antitumor activities, and based on the results, the potent compounds were selected for in vivo activity, as well. Only one compound 5m of the series has been found to be relatively more effective.
新系列的[4,6取代的二芳基-1,6-二氢嘧啶-2-基-氧甲基]-胺类化合物5a–o是通过在碱性介质中对各自的4,6-二芳基-3,4-二氢嘧啶-2(1H)-酮4进行曼尼希缩合反应合成的,使用了甲醛与三种二级胺,即二甲胺、哌啶和吗啉。这些二氢嘧啶酮4又是通过查尔酮3与尿素的环状缩合反应合成的。或者,化合物4也可以通过从乙酮、苯甲醛和尿素出发的三组分一锅合成反应直接制备。所有新合成化合物的结构已通过其光谱和分析数据得到确认。所有的O-曼尼希碱基5都被评估了体外细胞毒性和抗肿瘤活性,并根据结果选出了有效的化合物进行体内活性测试。在该系列中,仅发现化合物5m相对更有效。