A facile and effective synthesis of 2-azetidinones via phosphonitrilic chloride
作者:Maaroof Zarei
DOI:10.1016/j.tet.2013.05.121
日期:2013.8
The Staudinger reaction of imines to β-lactams was successfully achieved with substituted acetic acid and phosphonitrilicchloride in one-pot under mild conditions. Several types of β-lactams, especially 3-electron-withdrawing group β-lactams, can be synthesized by this versatile and efficient method in good to excellent yields. This method is simple, clean, and the by-products were removed by simple
An efficient and green method for the synthesis of 2-azetidinones mediated by propylphosphonic anhydride (T3P®)
作者:Maaroof Zarei
DOI:10.1007/s00706-014-1217-6
日期:2014.9
acids and imines using propylphosphonic anhydride (T3P®) as acid activator under mild and clean conditions. Monocyclic, spirocyclic and 3-electron-withdrawing group β-lactams were synthesized by this method and optimization of conditions were performed. Graphical abstract
β-Lactam Preparation via Staudinger Reaction with Activated Dimethylsulfoxide
作者:Maaroof Zarei
DOI:10.1002/jhet.2685
日期:2017.3
efficient synthesis of β‐lactams has been expediently accomplished. These β‐lactams were synthesized by the Staudinger reaction of several substituted imines with various carboxylic acids using activated DMSO at ambient temperature. The imines and substituted acetic acids contain alkyl, aryl, hetero aryl, polycyclic, and 3‐electron‐withdrawing group underwent [2 + 2] ketene‐imine cycloaddition reaction
DMF-dimethyl sulfate as a new reagent for the synthesis of β-lactams
作者:Aliasghar Jarrahpour、Maaroof Zarei
DOI:10.1016/j.tetlet.2009.01.092
日期:2009.4
alkoxymethylene-N,N-dimethyliminium salts, the adduct formed from DMF and O-alkylating agents. The advantages of this new method are mild reaction conditions, low cost, avoiding the use of chlorinating agents and easy purification of the products. The best results were obtained when DMF and dimethyl sulfate were used at room temperature.
Utilization of DMF–PhCOCl Adduct as an Acid Activator in a New and Convenient Method for Preparation of β-Lactams
作者:Maaroof Zarei
DOI:10.1246/bcsj.20110323
日期:2012.3.15
An efficient one-potsynthesis of β-lactams by the reaction of imines with acetic acid derivatives in the presence of DMF and benzoyl chloride adduct, a cheap reagent, has been described. Optimizat...