2881-31-4Relevant academic research and scientific papers
Ruthenium(IV) Intermediates in C?H Activation/Annulation by Weak O-Coordination
Liang, Yu-Feng,Yang, Long,Rogge, Torben,Ackermann, Lutz
supporting information, p. 16548 - 16552 (2018/10/26)
Ruthenium(IV) complexes were identified as key intermediates of C?H/O?H activations by weak O-coordination. Thus, the annulations of sulfoxonium ylides by benzoic acids provided expedient access to diversely-decorated isocoumarins with ample scope. Detailed experimental and computational studies provided strong support for a facile BIES-C?H activation, along with cyclometalated ruthenium(IV) intermediates within a versatile ruthenium(II/IV) catalysis regime (BIES=base-assisted internal electrophilic substitution).
Oxidation of 3-arylisochromans by dimethyldioxirane. An easy route to substituted 3-arylisocoumarins
Bovicelli, Paolo,Lupattelli, Paolo,Crescenzi, Benedetta,Sanetti, Anna,Bernini, Roberta
, p. 14719 - 14728 (2007/10/03)
The selective oxidation of the two different benzylethereal position of 3-arylisochromans by dimethyldioxirane as a function of different substituents on the aromatic rings was studied. The easy oxidation of these compounds was exploited for a new easy ac
Reactions of carbonyl compounds in basic solutions. Part 21. The mechanisms of the alkaline hydrolysis of substituted methyl 2-(2-oxopropyl)- and 2-(2-oxo-2-phenylethyl)-benzoates and 2-(2-acetylphenyl)- and 2-(2-benzoylphenyl)-acetates
Bowden, Keith,Byrne, Jane M.
, p. 2203 - 2206 (2007/10/03)
Rate coefficients have been measured for the alkaline hydrolysis of methyl 2-[2-oxo-2-(3- or 4-substituted phenyl)ethyl]benzoates, 2-[2-(3- or 4-substituted benzoyl)phenyl]acetates,2-(2-oxopropyl) and 2-(1,1-dimethyl-2- oxopropyl)benzoates, 2-(2-acetylphenyl)acetate and 2-(2-acetylphenyl)-2,2- dimethylacetates in 70% (v/v) dioxane-water at 30.0 °C. Those for the six parent esters were also measured at 45.0 and 60.0 °C and the enthalpies and entropies of activation have been evaluated. The relative rates of hydrolysis, activation parameters and substituent effects have been used to demonstrate neighbouring participation by the keto-carbonyl groups in the alkaline hydrolysis of the esters under study. For comparable systems, participation by six-membered ring intermediates appears somewhat less advantageous than five-membered.
The preparation of 2-(2-oxo-2-phenylethyl)benzoic acids from dilithiated ortho-toluic acid
Guion, Tina S.,Koller, Madlene U.,Lachicotte, Rene J.,Rutledge, Robin N.,Hildebran, Karen C.,Le, Phuong H.,Beam, Charles F.
, p. 1753 - 1762 (2007/10/03)
Ortho-Toluic acid was dimetalated with excess lithium diisopropylamide, and the resulting intermediate was condensed with a variety of aromatic esters to afford new substituted 2-(2-oxo-2-phenylethyl)benzoic acids (ortho-phenacylbenzoic acids).
Acyl Cyanides as Carbonyl Heterodienophiles
Connors, Richard,Durst, Tony
, p. 7277 - 7280 (2007/10/02)
Acyl cyanides have been shown to behave as carbonyl dienophiles in reactions with electron-rich o-quinodimethanes.This represents the first observation of an acyl cyanide carbonyl group reacting in such a manner.
