A mild, chemoselective, one-pot synthesis of δ-keto α-cyano esters by organocatalysis
作者:Gang Liu、Yingcai Wang
DOI:10.1016/j.tetlet.2013.10.145
日期:2014.1
A sequential condensation of α-cyanoesters, aldehydes, and ketones with catalytic amount of pyrrolidine/HOAc at room temperature has been developed. This method offers a chemoselective, one-pot cascade access to δ-keto α-cyanoesters with moderate to good yields under mild conditions.
The Michael Addition of Active Methylene Compounds to Chalcone Derivatives using a Catalytic Amount of Iodine and K<sub>2</sub>CO<sub>3</sub> at Room Temperature
作者:Yi-Ming Ren、Chun Cai
DOI:10.3184/174751911x12984726527461
日期:2011.3
A convenient method for the Michael addition of activemethylenecompounds to chalcone derivatives has been developed using the inexpensive and environmentally friendly reagent I2/K2CO3 at room temperature. The method is mild and proceeds with good to high yields.
A Mild, Efficient, and Green Procedure for Michael Addition of Active Methylene Compounds to Chalcones Under Microwave Irradiation
作者:Satya Paul、Monika Gupta、Parvinder Pal Singh、Rajive Gupta、André Loupy
DOI:10.1081/scc-200048473
日期:2005.1
Abstract A simple, rapid, and highly efficient method has been developed for the Michael addition of activemethylenecompounds to chalcones using potassium carbonate and water under microwave irradiation. The method is totally exempt of organic solvents, and pure products were obtained in good to excellent yields. This method can be used for the parallel synthesis and further scale‐up to 50 mmol of
Samarium(III) Iodide Promoted Three-Component Coupling Reactions of Aldehydes, α-Haloketones, and Active Methylene or Methyl Compounds
作者:Yongmin Ma、Yongmin Zhang
DOI:10.1081/scc-120016312
日期:2003.1.4
Abstract In the presence of samarium(III) iodide, the reaction of aldehydes, α-haloketones with malononitrile, ethylcyanoacetate or nitromethane proceeded very efficiently and furnished moderate to high yields of adducts.