Convenient Synthesis of 4-Methylene-2-oxazolidinones and 4-Methylenetetrahydro-1,3-oxazin-2-ones via Transition-Metal Catalyzed Intramolecular Addition of Nitrogen Atom to Acetylenic Triple Bond
Convenient Synthesis of 4-Methylene-2-oxazolidinones and 4-Methylenetetrahydro-1,3-oxazin-2-ones via Transition-Metal Catalyzed Intramolecular Addition of Nitrogen Atom to Acetylenic Triple Bond
5-Exo-dig aminocylization/hydroxyfluorination of propargylic carbamates
作者:Antonio Arcadi、Marco Chiarini、Luana Del Vecchio、Fabio Marinelli
DOI:10.1016/j.jfluchem.2018.04.002
日期:2018.7
The reaction was effectively promoted by NaHCO3 and/or silver catalysis. The peculiar behavior of propargylic carbamates bearing a chiral steroidal moiety is described. Extensions and limitations of the procedure with respect to urea derivatives, homopropargyl compounds, internal alkynes and one-pottransformations of propargylic alcohols with isocyanates are reported.
Regio and Stereoselective Synthesis of (<i>E</i>)-4-Arylidene/alkenylidene-3-tosyloxazolidin-2-ones through Palladium-Catalyzed Reactions of Aryl Iodides/Vinyl Triflates with Propargyl Tosylcarbamates
作者:Antonio Arcadi
DOI:10.1055/s-1997-927
日期:1997.8
The palladium-catalyzed reaction of aryl iodides/vinyl triflates with propargyl tosylcarbamates produces regio and stereoselectively (E)-4-Arylidene/alkenylidene-3-tosyloxazolidin-2-ones in moderate to good yields.