Application of Baylis–Hillman methodology in a novel synthesis of quinoline derivatives
作者:Oluwole B. Familoni、Perry T. Kaye、Phindile J. Klaas
DOI:10.1039/a807827k
日期:——
Reaction of 2-nitrobenzaldehyde with vinyl carbonyl compounds in the presence of 1,4-diazabicyclo[2.2.2]octane affords BaylisâHillman products, catalytic reduction of which results in direct cyclisation to quinoline derivatives.
for the synthesis of a novel pyrrolo-[3,2-c]quinoline N-oxide is described. The key step consisted in the palladium-catalyzed reductive cyclization of an uncommon 3-ketopyrrole derivative of o-nitrobenzaldehyde, obtained in a straightforward manner through an aza-Baylis–Hillman/ring closing metathesis/aromatization reaction. A deoxygenation reaction of this novel pyrrolo-[3,2-c]quinoline N-oxide afforded
描述了一种合成新型吡咯并-[3,2 - c ]喹啉N-氧化物的新方法。关键步骤包括钯催化的一种罕见的邻硝基苯甲醛的3-酮吡咯衍生物的还原环化反应,该反应是通过aza-Baylis-Hillman /环闭合复分解/芳构化反应以直接方式获得的。该新颖的吡咯并[3,2 - c ]喹啉N-氧化物的脱氧反应提供了新的取代的吡咯并[3,2- c ]喹啉类似物。
StarchSulfuric Acid (SSA) as Catalyst for a One-Pot Synthesis of 1,5-Diaryl-1<i>H</i>-pyrazoles
作者:Farhad Hatamjafari
DOI:10.1002/hlca.201200621
日期:2013.8
Protocols with starchsulfuricacid (SSA) as reusable catalyst for the synthesis of aryl‐1H‐pyrazoles are described. SSA acted as an efficient and environmentally friendly catalyst for the regioselective condensation of BaylisHillman adducts 1 with phenylhydrazine hydrochloride leading to the new 1,5‐diaryl‐1H‐pyrazole 2a–2e in excellent yields (Scheme and Table 1).
A Green, Reusable and Highly Efficient Heterogeneous Catalyst for the Synthesis of Arylpyrazoles using Nano-Fe2O3
作者:Farhad Hatamjafari
DOI:10.13005/ojc/280120
日期:2012.3.18
Series of some new arylpyrazole derivatives have been synthesized in good yields via one-pot condensation reaction using nano-Fe 2 O 3 as heterogeneouscatalyst.
使用纳米Fe 2 O 3作为非均相催化剂,通过一锅缩合反应以高收率合成了一系列新的芳基吡唑衍生物。
Microwave Assisted Synthesis of Arylpyrazoles Using Montmorillonite K-10
作者:Farhad Hatamjafari
DOI:10.14233/ajchem.2013.13306
日期:——
Montmorillonite K-10 clay catalyzed Friedlander condensation of Baylis-Hillman adducts with phenyl hydrazine hydrochloride afforded 1,5-diarylpyrazoles.