One-Pot Silyl Ketene Acetal-Formation Mukaiyama-Mannich Additions to Imines Mediated by Trimethylsilyl Trifluoromethanesulfonate
作者:C. Wade Downey、Jared A. Ingersoll、Hadleigh M. Glist、Carolyn M. Dombrowski、Adam T. Barnett
DOI:10.1002/ejoc.201500958
日期:2015.11
the presence of trimethylsilyl trifluoromethanesulfonate and trialkylamine base, thioesters are readily converted into silyl ketene acetals in situ and undergo Mukaiyama–Mannichaddition to N-phenylimines in one pot. The silyl triflate appears to play two roles, activating both the thioester and the imine. This process also works well when thioesters are replaced with amides, esters, or ketones. Products
Synthesis of β-Amino Ketones using graphene oxide: a benign carbonaceous acid catalyst for Mannich reaction
作者:Nagappan Saravana Ganesan、Palaniswamy Suresh
DOI:10.1007/s11164-020-04324-3
日期:2021.3
preparable graphene oxide (GO) is used as a straightforward carbocatalyst for the synthesis of β -amino ketones via a 3-component Mannich reaction under mild condition. The native GO is acting as a carbonaceous solid Brønsted acid catalyst without any special functionalization, yielding a spectrum of β -amino ketones under metal-free conditions. The present catalytic method offers a benign and simple procedure
Reusable 1,2,4-Triazolium Based Brønsted Acidic Room Temperature Ionic Liquids as Catalyst for Mannich Base Reaction
作者:Sankaranarayanan Nagarajan、Elango Kandasamy
DOI:10.1007/s10562-014-1312-7
日期:2014.9
Unprecedented examples of 1-alkyl-1,2,4-triazolium methanesulfonate based Brønsted acidic room temperature ionicliquids were synthesized and characterized. Their catalytic activity and efficiency in recyclability and reusability on one pot synthesis of halide substituted β-amino carbonyl compounds are reported.Graphical Abstract
Titanium tetrachloride incorporated crosslinked polystyrene copolymer as an efficient and recyclable polymeric Lewis acid catalyst for the synthesis of <i>Β</i>-amino carbonyl compounds at room temperature
作者:Ali Rahmatpour、Reza Eeimen、Niloofar Goodarzi
DOI:10.1080/00397911.2019.1650379
日期:——
shelf-stable acidic, water tolerant material, and it is not easily hydrolyzed by water. Our findings thus show a novel and improved modification of the Mannich type reaction in terms of mild reaction conditions, clean reaction profiles, applicability to various substrates using a simple workup procedure which makes this reaction an interesting alternative to previously applied procedures. The recyclability
Highly Efficient One-pot Synthesis, Antimicrobial and Docking Studies of Newer β-amino Carbonyl Derivatives Catalyzed by Silica Sulfuric Acid
作者:Kh. A. M. El-Bayouki、W. M. Basyouni、A. S. El-Sayed、W. M. Tohamy、A. A. El-Henawy
DOI:10.5562/cca1983
日期:——
acid for the synthesis of β-amino carbonyl derivatives. Reaction time and yield of the products depended on the nature of acetophenone and aniline subsituents. Using aliphatic amines instead of aromatic amines under same reaction conditions, afforded aldol condensation products without yielding the expected β-amino ketones. Replacing the acetophenone derivatives with rhodanine yielded 5-(4-fluoroben