154476-91-2Relevant academic research and scientific papers
Alkylation of Terminal Alkynes under Zinc Lewis Acid Catalysis and Its Mechanistic Studies
Osano, Mana,Kida, Takeru,Yonekura, Kyohei,Tsuchimoto, Teruhisa
supporting information, p. 2825 - 2831 (2019/04/13)
With a zinc Lewis acid catalyst and proton sponge in toluene, terminal alkynes were found to undergo the alkylation by alkyl triflates to provide unsymmetrical internal alkynes. This is the first example that a simple alkyl chain other than benzylic and norbornyl units can be introduced onto the alkynyl carbon atom under Lewis acid catalysis. Mechanistic studies revealed that the activation of the alkyne by the zinc Lewis acid and proton sponge is the trigger of the reaction to give a monoalkynylzinc species, which successively reacts with the alkyl triflate to afford the internal alkyne. A radical pathway is unlikely in this system. (Figure presented.).
Synthesis of substituted α-methylene lactams by rhodium catalysed carbonylation of acetylenic amines
Campi,Chong,Jackson,Van Der Schoot
, p. 2533 - 2542 (2007/10/02)
Reactions of γ- and β-aminoalkynes, (2) and (5) with hydrogen and carbon monoxide in the presence of rhodium catalysts give substituted α-methylene-2-piperidinones (7) and 2-pyrrolidinones (11).
