One-Pot, Regioselective Synthesis of Homopropargyl Alcohols using Propargyl Bromide and Carbonyl Compound by the Mg-mediated Reaction under Solvent-free Conditions
in organic synthesis is the most important goal in “Green” chemistry. We report a simple, efficient and facile method for the addition of progargyl bromide to carbonyl compounds using Mg metal as a mediator undersolvent-freeconditions which could regioselectively generate homopropargyl alcohols efficiently in good to excellent yields. The procedure has advantages such as short reaction time, operationally
Barbier-type propargylation of carbonyl compounds with propargyl bromide has been achieved with reactive zinc–copper couple under solvent-free conditions. The reaction of aldehydes with propargyl bromide produced the unique homopropargyl alcohols in excellent yields at room temperature without the formation of homoallenyl alcohols. The ketones reacted with propargyl bromide to give the corresponding homopropargyl
Furo[3,2-c]Pyridine and Thieno[3,2-c]pyridine compounds of Formula I, and pharmaceutically acceptable salts thereof, preparation, intermediates, pharmaceutical compositions, and use, such as in disease treatment, including cancers, including conditions in which EMT is involved, including conditions mediated by protein kinase activity such as RON and/or MET.
A green method for the sulfination of allenic carbonyl compounds to access a wide variety of vinylic sulfones is developed. This reaction works in aqueousmedia under very mild conditions. This reaction is atom economic. A wide variety of vinylic sulfones could be obtained in moderate to excellent yields with wide functional group tolerance. The efficiency of this method is demonstrated in some reactions
Revisiting the Addition of in-situ Nucleophiles to Allenic Ketones: An Entry Towards Synthesis of Benzodioxins
作者:Sushree Ranjan Sahoo、Debayan Sarkar
DOI:10.1002/ejoc.202000076
日期:2020.3.22
A revisit towards regioselective addition of in situ generated negative nucleophiles to allenicketones in the presence of a base. A direct ring annulation towards the benzodioxin skeleton synthesis has been developed. In the process, the obtained E‐vinyl kenones were readily transformed into sulfones and 2,5‐disubstituted oxazole.