Novel 5-functionalized-pyrazoles: Synthesis, characterization and pharmacological screening
作者:Shridevi D. Doddaramappa、K.M. Lokanatha Rai、Ningaiah Srikantamurthy、Chandra、Javarasetty Chethan
DOI:10.1016/j.bmcl.2015.06.050
日期:2015.9
O-substituted pyrazoles 7(a–f) and N-substituted pyrazoles 9(a–f) were synthesized via phase-transfer catalyzed reaction of ethyl 5-(bromomethyl)-1,3-diphenyl-1H-pyrazole-4-carboxylate 5 with various oxygen and nitrogen containing compounds in presence of tetrabutylammonium bromide (TBAB) in THF. The compound 5 was obtained by the efficient bromination with N-bromosuccinimide (NBS) in presence of a catalytic
在本研究中,通过乙基5-(溴甲基)-1,3-二苯基-的相转移催化反应,合成了一系列O-取代的吡唑7(a - f)和N-取代的吡唑9(a - f)。在THF中存在溴化四丁铵(TBAB)的情况下,具有各种含氧和氮的化合物的1 H-吡唑-4-羧酸酯5。在催化量的偶氮二双丁腈(AIBN)存在下,在回流的CCl 4中,用N-溴琥珀酰亚胺(NBS)有效溴化得到化合物5。。评价合成的化合物的体外抗微生物和抗糖尿病活性,并与标准药物进行比较。在合成的化合物中,化合物9b以优异的抗菌剂和抗糖尿病药出现。新合成的化合物通过分析和光谱(IR,1 H NMR,13 C NMR和LC-MS)方法进行表征。