Tandem allylic oxidation–condensation/esterification catalyzed by silica gel: an expeditious approach towards antimalarial diaryldienones and enones from natural methoxylated phenylpropenes
作者:Abhishek Sharma、Naina Sharma、Amit Shard、Rakesh Kumar、Dinesh Mohanakrishnan、Saima、Arun K. Sinha、Dinkar Sahal
DOI:10.1039/c1ob05293d
日期:——
A new one-pot strategy has been developed, wherein abundantly available methoxylated phenylpropenes are directly transformed into corresponding dienones (1,5-diarylpenta-2,4-dien-1-ones) and enones (chalcones and cinnamic esters) via allylic oxidationâcondensation or allylic oxidationâesterification sequences. Preliminary antimalarial activity studies of the above synthesized diaryldienones and enones against Plasmodium falciparum (Pf3D7) have shown them to be promising lead candidates for developing newer and economical antimalarial agents. In particular, two enones (12b and 13b) were found to possess comparatively better activity (IC50 = 4.0 and 3.4 μM, respectively) than licochalcone (IC50 = 4.1 μM), a well known natural antimalarial compound.
开发了一种新的单锅法策略,利用丰富的甲氧基化苯丙烯类化合物,通过烯丙位氧化-缩合或烯丙位氧化-酯化序列,直接转化为相应的二烯酮(1,5-二芳基-2,4-戊二烯-1-酮)和烯酮(查耳酮和肉桂酸酯)。对上述合成的二芳基二烯酮和烯酮进行的初步抗疟活性研究表明,它们是开发新型经济抗疟药物的有希望的先导候选物。特别是,两个烯酮(12b和13b)的活性(IC50分别为4.0和3.4微摩尔)优于已知的天然抗疟化合物licochalcone(IC50=4.1微摩尔)。