Organocatalytic Reductive Propargylation: Scope and Applications
作者:Mohammed Anif Pasha、A. Vamshi Krishna、Etikala Ashok、Dhevalapally B. Ramachary
DOI:10.1021/acs.joc.9b02415
日期:2019.12.6
reductive coupling protocol has been developed for the selective high-yielding synthesis of nearly fifty examples of propargylated cyclic/acyclic systems from the various propargyl aldehydes, cyclic/acyclic CH acids, and Hantzsch ester under ambient conditions. It is an economical, efficient, catalytic, metal-free protocol for the quick gram-scale synthesis of propargylated cyclic/acyclic compounds
Polyethylene glycol (PEG-400) promoted as an efficient and recyclable reaction medium for the one-pot eco-friendly synthesis of functionalized isoxazole substituted spirooxindole derivatives
作者:Nagi Reddy Modugu、Praveen Kumar Pittala
DOI:10.1039/c7nj03515b
日期:——
An efficient, inexpensive and environmentally friendly synthesis of novel isoxazole substituted spirooxindole-pyridopyrimidine/indenopyridine/chromenopyridine/naphthyridine/quinoline derivatives has been developed via one-pot three-component reaction of isoxazolyl enamino esters, isatins and 1,3-dimethylbarbituric acid/1,3-indandione/chromene-2,4-dione/quinoline-2,4-dione/naphthalene-1,2,4-trione/dimedone
Microwave-assisted synthesis of fused pyrazolo[3,4-b]pyrazines by the reaction of ortho-aminonitrosopyrazoles and cyclic β-diketones
作者:Jairo Quiroga、Norha E. Sánchez、Paola Acosta、Braulio Insuasty、Rodrigo Abonia
DOI:10.1016/j.tetlet.2012.04.083
日期:2012.6
Novel fused pyrazolo[3,4-b]pyrazines 3 were prepared by assisted microwave cyclocondensation reaction of ortho-aminonitrosopyrazoles 1 and cyclic β-diketones 2 in dimethylformamide. This protocol provides a simple procedure for the synthesis of the title compounds with the advantages of easy work-up, mild reaction conditions and good yields.
新型的稠合吡唑并[3,4- b ]吡嗪3是通过在二甲基甲酰胺中进行的邻氨基亚硝基吡唑1和环状β-二酮2的微波环缩合反应制备的。该方案为标题化合物的合成提供了一种简单的方法,具有易于后处理,温和的反应条件和良好的收率的优点。
Synthesis of novel dihydrofuro[b]-pyridinone derivatives: oxidation coupling of 3-hydroxy-4(1H)-pyridinone with β-dicarbonyl compounds
Oxidation coupling of 3-hydroxy-4(1H)-pyridinone with β-dicarbonyl compounds led to unexpected dihydrofuro[b]-pyridinone derivatives, indicating an alternative pathway other than that with anilines or thiols. By this strategy, six novel dihydrofuro[b]-pyridinone derivatives were synthesized.
3-羟基-4(1 H)-吡啶酮与β-二羰基化合物的氧化偶联导致意外的二氢呋喃并[ b ]-吡啶酮衍生物,这表明苯胺或硫醇以外的另一种途径。通过这种策略,合成了六种新颖的二氢呋喃并[ b ]-吡啶酮衍生物。