Ni-Catalyzed Alkenylation of Triazolopyridines: Synthesis of 2,6-Disubstituted Pyridines
作者:Sheng Liu、James Sawicki、Tom G. Driver
DOI:10.1021/ol301606y
日期:2012.7.20
A synthetic strategy to access 2,6-disubstitutedpyridines from triazolopyridines through a regioselective nickel-catalyzed alkenylation reaction of the C7–H bond is described. The N2 fragment embedded in the resulting C–H functionalized triazolopyridine can be readily excised using acidic or oxidative conditions to unmask the pyridine.
Saturated aldehydes and ketones are converted via their p-toluenesulfonyl hydrazones to the corresponding alkanes using dichloro bis(1,4-diazabicydo[2.2.2]octane)(tetrahydroborato) zirconium(IV) (ZrBDC). The reactions were performed in DMF-sulfolane at 110 °C and gave the corresponding alkanes in high yields. Regioselectivity in the reduction of α,β-unsaturated carbonyl groups was also observed.
Synthesis, anti-inflammatory and analgesic activity evaluation of some amidine and hydrazone derivatives
作者:Sham M. Sondhi、Monica Dinodia、Ashok Kumar
DOI:10.1016/j.bmc.2006.02.014
日期:2006.7
spectral and analytical data. Anti-inflammatory activity evaluation was carried out using carrageenin-induced paw oedema assay and compounds 3e,f and 5e exhibited good anti-inflammatory activity, that is 52%, 37% and 38% at 50 mg/kg po, respectively. Analgesic activity evaluation was carried out using acetic acid writhing assay and compounds 3a,c,e and 5f showed good analgesic activity, that is, 50%, 50%
在甲醇钠存在下,氰基吡啶和氰基吡嗪与磺酰肼缩合,合成了许多am衍生物(3a-i)。通过固相微波辐射,将2-乙酰基吡啶和4-乙酰基吡啶与磺酰肼缩合,得到相应的(5a-d)。通过在乙酸中回流,将3-吲哚甲醛与磺酰肼缩合,得到相应的缩合产物(5e和f)。通过结晶或通过柱色谱法纯化所有化合物,即3a-i和5a-f。正确的IR,(1)H NMR,质谱和分析数据支持所有合成化合物的结构。使用角叉菜胶诱导的爪水肿测定法进行抗炎活性评估,化合物3e,f和5e表现出良好的抗炎活性,口服50 mg / kg时分别为52%,37%和38%。使用乙酸扭曲试验进行镇痛活性评估,化合物3a,c,e和5f表现出良好的镇痛活性,即在50 mg / kg po下分别具有50%,50%,50%和60%的镇痛活性。
Synthesis of Fused [1,2,3]-Triazoloheteroarenes via Intramolecular Azo Annulation of N-Tosylhydrazones Catalyzed by 1,8-Diaza-bicyclo[5.4.0]undec-7-ene
作者:Orume J. Edirin、Jesse D. Carrick
DOI:10.1021/acs.joc.4c00627
日期:2024.5.17
synthon for drug discovery, C–Hfunctionalization, and complexant design for minor actinide separations. While contemporary work has demonstrated the capacity to leverage downstream functional group interconversion of the triazolopyridine, a broadly applicable method tolerant of diverse heteroaryl constructs and pendant functionality to obtain triazoloheteroarenes remains under reported. In this work,