136933-87-4Relevant academic research and scientific papers
Anion-induced enantioselective cyclization of diynamides to pyrrolidines catalyzed by cationic gold complexes
Mourad, Asmaa Kamal,Leutzow, Juliane,Czekelius, Constantin
supporting information, p. 11149 - 11152 (2013/01/15)
Only chiral anions do the job! Optically active gold complexes derived from substituted binol hydrogen phosphate catalyze the desymmetrizing cyclization of 1,4-diynamides. This reaction provides access to synthetically useful, chiral methylene pyrrolidine
Reversal of selectivity in gold-catalyzed cyclizations of 3,3-disubstituted 1,4-diynes
Ruettinger, Roman,Leutzow, Juliane,Wilsdorf, Michael,Wilckens, Kristina,Czekelius, Constantin
supporting information; body text, p. 224 - 227 (2011/03/20)
A general synthetic access to 3,3-disubstituted 1,4-diynes bearing a quaternary carbon center from acetylacetone was developed. The compounds were cyclized to the corresponding enol ethers by cationic gold complexes. The reactions occur in complete exo-se
Mn(III)-mediated in-cell electrochemical addition of active methylene compounds to olefins: synthetic and mechanistic aspects
Nedelec, Jean-Yves,Lachaise, Isabelle,Nohair, Khaddouj,Paugam, Jean Paul,Hakiki, Marjouba
, p. 843 - 849 (2007/10/02)
The Mn-mediated in-cell electrochemical addition of active methylene compounds is an interesting alternative to usual chemical methods notably with respect to the amount of manganese salt used.The electrochemical approach however requires the reagent to be readily oxidized in order to be associated with an efficient in situ anodic regeneration process.We have used amperometric measurements to show that the rate constants for the Mn(III)-oxidation of active methylene compounds at 60 deg C range between 10-2 and 1.2 L mol-1 s-1.In this study we show that the addition reaction occurs in the coordination sphere of Mn; this requires the active methylene compound and the olefin to be coordinated to the Mn salt.This aspect can be critical in the electrochemical process insofar as the catalytic manganese salt can sometimes be fully coordinated by only one reagent, either the active methylene compound (eg, 2,4-pentanedione) or the olefin (eg, styrene). - Key words: electrochemistry; manganese(III); addition reaction; free radical
PREPARATION AND CONFORMATIONAL ANALYSIS OF SEVERELY HINDERED β-DIKETONES. DIPOLE MOMENT DETERMINATIONS AND THEORETICAL CALCULATIONS.
Moreno-Manas, M.,Gonzalez, A.,Jaime, C.,Lloris, M. E.,Marquet, J.,et al.
, p. 6511 - 6520 (2007/10/02)
Several β-diketones bearing bulky substituents at the intercarbonyl positions have been prepared by alkylation of the cobalt(II) complexes of the unsubstituted diketones.Agreement between experimental and calculated dipole moments is fairly good thus rend
