3462-52-0Relevant academic research and scientific papers
FLUORIDE ION INDUCED REACTIONS OF ORGANOSILANES: THE PREPARATION OF MONO AND DICARBONYL COMPOUNDS FROM β-KETOSILANES.
Fiorenza, Mariella,Mordini, Alessandro,Papaleo, Sandro,Pastorelli, Stefania,Ricci, Alfredo
, p. 787 - 788 (1985)
β-ketosilanes react with a variety of carbon electrophiles in the presence of CsF to give mono- and dicarbonyl derivatives in reasonably good yields.
Reactivity of Lithium β-Ketocarboxylates: The Role of Lithium Salts
Berton, Mateo,Mello, Rossella,Williard, Paul G.,González-Nú?ez, María Elena
supporting information, p. 17414 - 17420 (2017/12/15)
Lithium β-ketocarboxylates 1(COOLi), prepared by the reaction of lithium enolates 2(Li+) with carbon dioxide, readily undergo decarboxylative disproportionation in THF solution unless in the presence of lithium salts, in which case they are indefinitely stable at room temperature in inert atmosphere. The availability of stable THF solutions of lithium β-ketocarboxylates 1(COOLi) in the absence of carbon dioxide allowed reactions to take place with nitrogen bases and alkyl halides 3 to give α-alkyl ketones 1(R) after acidic hydrolysis. The sequence thus represents the use of carbon dioxide as a removable directing group for the selective monoalkylation of lithium enolates 2(Li+). The roles of lithium salts in preventing the disproportionation of lithium β-ketocarboxylates 1(COOLi) and in determining the course of the reaction with bases and alkyl halides 3 are discussed.
In tandem or alone: A remarkably selective transfer hydrogenation of alkenes catalyzed by ruthenium olefin metathesis catalysts
Zieliski, Grzegorz Krzysztof,Samojlowicz, Cezary,Wdowik, Tomasz,Grela, Karol
supporting information, p. 2684 - 2688 (2015/04/14)
A system for transfer hydrogenation of alkenes, composed of a ruthenium metathesis catalyst and HCOOH, is presented. This operationally simple system can be formed directly after a metathesis reaction to effect hydrogenation of the metathesis product in a single-pot. These hydrogenation conditions are applicable to a wide range of alkenes and offer remarkable selectivity. This journal is
Platinum(IV)-Catalyzed Synthesis of Unsymmetrical Polysubstituted Benzenes via Intramolecular Cycloaromatization Reaction
Zheng, Shuyan,Zhang, Jinghua,Shen, Zhengwu
supporting information, p. 2803 - 2808 (2015/09/28)
A one-pot synthesis of polysubstituted benzene derivatives was achieved via a platinum(IV)-catalyzed intramolecular cycloaromatization reaction. The reaction proceeds via a tandem skeletal rearrangment, dehydration and double bond isomerization, which proved to be very useful for the syntheses of a range of interesting polyalkyl-substituted benzenes.
Reaction of tetracarbonyl(π-allyl)manganese with carbon nucleophiles
Vaughan, William S.,Gu, Henry H.,McDaniel, Keith F.
, p. 1885 - 1888 (2007/10/03)
Nucleophilic attack on tetracarbony (π-allyl)manganese takes place at the terminus of the π-system, generating allylated products in 44-95% yield after oxidation. Stabilized nucleophiles (pK(a) 12-20) give mainly bis allylation whereas nonstabilized nucleophiles (pKa 25-35) give mono allylation.
On the π-π interaction in the benzylation of ketones
Diez-Barra, Enrique,Merino, Sonia,Sanchez-Verdu, Prado,Torres, Jose
, p. 11437 - 11448 (2007/10/03)
The benzylation of a set of nine ketones provides enough information to establish how the ketone structure affects the existence of a π-π interaction. The presence of a phenyl moiety starting from the a-carbon atom and flexibility in cyclic ketones are st
Allylated ketosulphides of benzothiazole as intermediates for stereoselective synthesis of allyl ketones, allyl thiiranes and dienes
Calo, Vincenzo,Fiandanese, Vito,Nacci, Angelo,Volpe, Angela
, p. 2155 - 2166 (2007/10/03)
α-Ketosulphides of benzothiazol 1 react with allylic carbonates in the presence of palladium acetate in dichloromethane under mild conditions affording α- and α,α-diallylated ketosulphides 2 in high yields. Reductive desulphurization of 2a-d with tributyl
Palladium-catalysed Synthesis of α-Diallylated Ketosulphides of Benzothiazole and their Transformation into Diallyl Thiiranes and Trienes
Calo, Vincenzo,Fiandanese, Vito,Nacci, Angelo,Scilimati, Antonio
, p. 171 - 174 (2007/10/02)
α-Ketosulphides of benzothiazole 1 react with allylic carbonates in the presence of palladium acetate in dichloromethane under mild conditions affording α,α-diallylated ketosulphides 2 in high yields.Reduction of 2 with sodium borohydride in isopropanol gives episulphides which in turn can be transformed almost quantitatively into trienes.
A Short, General, Organoselenium-mediated Synthesis of Cyclic Acetals
Mehta, Goverdhan,Rao, H. Surya Prakash,Reddy, K. Raja
, p. 78 - 80 (2007/10/02)
Readily available substrates containing a strategically placed carbonyl group and two isolated double bonds can be coaxed into cyclic acetal formation in a single step employing phenylselenenyl chloride in aqueous acetonitrile.
2-Allylisourea as an Effective Agent for Direct α-Allylation of Ketone and Aldehyde Assisted by Palladium(0) under Neutral Conditions
Inoue, Yoshio,Toyofuku, Masanori,Taguchi, Masaaki,Okada, Shin-ichi,Hashimoto, Harukichi
, p. 885 - 892 (2007/10/02)
Direct α-allylation of a variety of ketones and aldehydes with 2-allylisourea took place in the presence of a catalytic amount of a palladium(0) complex under neutral and mild conditions.Scope and limitations of this novel method have been investigated.
