Direct Arylation of Imidazo[1,5-<i>a</i>]azines Through Ruthenium and Palladium Catalysis
作者:Daniela Sustac Roman、Valentin Poiret、Guillaume Pelletier、André B. Charette
DOI:10.1002/ejoc.201403268
日期:2015.1
The regioselective RuII-catalyzed direct ortho-arylation of C-3 aryl-substituted imidazo[1,5-a]azines with (hetero)aryl halides was investigated. The employment of RuII and PdII catalysts in the same flask resulted in two sequential and distinct C–H bond arylations, which allowed the rapid synthesis of highly conjugated compounds.
Triflic Anhydride Mediated Synthesis of Imidazo[1,5-<i>a</i>]azines
作者:Guillaume Pelletier、André B. Charette
DOI:10.1021/ol400870b
日期:2013.5.3
Imidazo[1,5-a]azines are synthesized in moderate to excellent yields using a mild cyclodehydration/aromatization reaction triggered by the use of triflic anhydride (Tf2O) and 2-methoxypyridine (2-MeOPyr). Various substitution patterns and functional groups were found to be compatible under the optimized conditions. In addition, a 5-bromo-3-aryl derivative was also shown to be active in a Sonogashira
使用温和的环脱水/芳香化反应,通过使用三氟甲磺酸酐(Tf 2 O)和2-甲氧基吡啶(2-MeOPyr)引发,可以中等至极好的收率合成咪唑并[1,5- a ]嗪。发现各种取代模式和官能团在优化条件下是相容的。此外,还显示了5-溴-3-芳基衍生物在Sonogashira交叉偶联和直接芳基化反应中具有活性。叔酰胺与底物相容,可合成三氟甲磺酸咪唑并[1,5- a ]吡啶鎓。
A new synthetic route for synthesis of
<scp>3‐substituted</scp>
imidazo[1,5‐
<i>a</i>
]pyridines
作者:Jugal Bori、Vadivelu Manivannan
DOI:10.1002/jhet.4449
日期:2022.6
A new convenient route for the synthesis of 3-substituted-imidazo[1,5-a]pyridines has been described as well as the scope and limitations of the method are evaluated. By reacting 2-picolylamine and different aldehydes in presence of selenium dioxide as the oxidant, a series of 3-substituted imidazo[1,5-a]pyridines was isolated in good yields. Different kinds of aldehydes such as aliphatic, aromatic
描述了合成 3-取代的咪唑并[1,5- a ]吡啶的一种新的便捷途径,并评估了该方法的范围和局限性。通过在二氧化硒作为氧化剂存在下使2-吡啶甲胺和不同的醛反应,以良好的收率分离出一系列3-取代的咪唑并[1,5- a ]吡啶。已经使用了不同种类的醛,例如脂肪族、芳香族、杂环以及带有一些取代基的芳香环。