488150-68-1Relevant academic research and scientific papers
Gold promoted arylative cyclization of alkynoic acids with arenediazonium salts
Carrillo-Arcos, Ulises A.,Porcel, Susana
, p. 1837 - 1842 (2018/03/23)
Alkynoic acids derived from salicylic acid and analogues undergo arylative cyclization with arenediazonium salts promoted by gold in the absence of external ligands. The reaction is thermally induced and proceeds even in the absence of light. A difference in regioselectivity has been found compared with that observed in the cycloisomerization process of the same type of compounds.
Palladium-catalyzed cyclization of alkynoic acids to form vinyl dioxanones bearing a quaternary allylic carbon
Ogiwara, Yohei,Sato, Kazuya,Sakai, Norio
supporting information, p. 5296 - 5299 (2017/11/06)
A palladium-catalyzed intramolecular reaction of carboxylic acids and alkynes in a novel cyclization manner was developed. This unique cyclization efficiently provided a wide range of complex ring systems-vinyl dioxanones bearing a quaternary allylic carbon. Mechanistic studies suggest an allenyl carboxylate as an intermediate.
Enantioselective tandem formation and [2,3]-sigmatropic rearrangement of cyclic propargylic oxonium ylides catalyzed by dirhodium(II) tetrakis[N-phthaloyl-(S)-tert-leucinate]
Tsutsui, Hideyuki,Matsuura, Maya,Makino, Kazuishi,Nakamura, Seiichi,Nakajima, Makoto,Kitagaki, Shinji,Hashimoto, Shunichi
, p. 283 - 295 (2007/10/03)
This paper describes the first examples of catalyst-dependent asymmetric induction in the periselective [2,3]-sigmatropic rearrangement of propargylic oxonium ylides generated by catalytic diazo decomposition. Catalysis of α-diazo-β-keto esters 4a-g using
