100780-25-4Relevant academic research and scientific papers
Ruthenium-Catalyzed One-Pot Double Allylation/Cycloisomerization of 1,3-Dicarbonyl Compounds Leading to exo-Methylenecyclopentanes
Yamamoto, Yoshihiko,Nakagai, Yu-Ichiro,Itoh, Kenji
, p. 231 - 236 (2004)
The ruthenium-catalyzed one-pot double allylation/cycloisomerization of 1,3-diketones and methyl acetoacetate gave exo-methylenecyclopentanes in moderate to good yields with high isomer selectivity. The double allylation step effectively proceeded in the presence of a RuII precatalyst, [Cp*RuCl(cod)], in 1,2-dichloroethane at 90°C. The subsequent cycloisomerization was carried out upon addition of triethylsilane as a hydride source without purification of a 1,6-diene intermediate. Detailed inspections of the reaction by 1H NMR spectroscopy disclosed that triethylsilyl methyl ether plays an important role for the conversion of a ruthenium(IV) allyl complex formed in the double allylation step into a ruthenium(II) species required for the cycloisomerization.
Addition-Cyclization catalysed by Palladium(II)
Trost, Barry M.,Burgess, Kevin
, p. 1084 - 1086 (1985)
Palladium catalysed nucleophilic additions to 1,6-dienes and a 1,6-enyne lead to cyclization in preference to β-hydrogen insertion; a novel cyclization of a 1,6-enyne to a 1,2-dimethylenecyclopentane is also reported.
Phase Transfer Catalysed Alkylations of Bis(benzenesulfonyl)methane
Koteswar Rao, Y.,Nagarajan, M.
, p. 1031 - 1033 (2007/10/02)
Alkylations of bis(benzenesulfonyl)methane under phase transfer catalysed conditions are reported.Variations in the phase transfer catalyst, alkylating reagent and the cosolvent have been studied with a view to understanding the course of the reaction.Opt
