A simple and efficient method for the synthesis of Erlenmeyer azlactones
作者:Philip A. Conway、Kevin Devine、Francesca Paradisi
DOI:10.1016/j.tet.2009.02.011
日期:2009.4
novel and efficient method for synthesising Erlenmeyerazlactones under mild and rapid conditions. The reaction is performed by reacting 2-phenyl-5-oxazolone with an aldehyde in dichloromethane using alumina as a catalyst. The materials react instantly at room temperature, negating the need for high temperatures and long reaction times. We have successfully used this method for both aliphatic, aromatic
MgO/Al2O3 catalyzes the synthesis of azlactone derivatives from condensation reaction of aldehydes (or ketones) with hippuric acid and acetic anhydride as a dehydrating agent under microwave irradiation. The low toxicity, low cost, ease of handling, and high activity of MgO/Al2O3 make this procedure particularly attractive. Also, this catalyst can be easily recovered by decant and can be reused for
MgO / Al 2 O 3催化醛(或酮)与作为脱水剂的马尿酸和乙酸酐的缩合反应在微波辐射下的合成内酯衍生物。MgO / Al 2 O 3的低毒性,低成本,易于处理和高活性使该程序特别有吸引力。同样,该催化剂可以容易地通过倾析回收,并且可以连续五次重复用于该缩合反应,而不会显着降低其催化活性。
Catalyst-Free and Green Synthesis of Some Novel Benzamide Derivatives
In the present work, a simple, green, rapid, and catalyst‐free procedure for the synthesis of benzamidederivatives by ring opening of azlactones with diamines such as ethylene diamine and 1,3‐propylenediamine is described. The present method offers several advantages such as short reaction times, easy work‐up, and mild reaction conditions in the absence of catalyst and any toxic solvent and material
Palladium-Catalyzed Diastereo- and Enantioselective Synthesis of Substituted Cyclopentanes through a Dynamic Kinetic Asymmetric Formal [3+2]-Cycloaddition of Vinyl Cyclopropanes and Alkylidene Azlactones
作者:Barry M. Trost、Patrick J. Morris
DOI:10.1002/anie.201101684
日期:2011.6.27
An enantioselective preparation of vinylcyclopentanes has been achieved through the title reaction (see scheme). A range of aryl, heterocyclic, alkenyl, and alkyl substitutedazlactonealkylidenes have been utilized, giving the cyclopentane products in good yield, diastereomeric ratio, and enantioselectivity.
Base Induced Condensation of Malononitrile with Erlenmeyer Azlactones: An Unexpected Synthesis of Multi‐Substituted Δ
<sup>2</sup>
‐Pyrrolines and Their Cytotoxicity
作者:Seegehalli M. Anil、Muddenahalli S. Sudhanva、Toreshettahally R. Swaroop、Ajjampura C. Vinayaka、Narasimhamurthy Rajeev、Kuppalli R. Kiran、Rangappa Shobith、Maralinganadoddi P. Sadashiva
DOI:10.1002/cbdv.202000014
日期:2020.5
synthesized products were screened for cytotoxic properties on different cancer cell lines such as A549 (Human lung adenocarcinoma cells), HeLa (Human cervical adenocarcinoma cells), Jurkat (Human chronic myeloid leukemia cells) and K562 (Human leukemic T cell Lymphoblast cells). Among the synthesized library of compounds, 6f and 6q displayed potent cytotoxic activity.