226900-30-7Relevant articles and documents
Synthesis and competency of a novel dicationic phase-transfer catalyst
Kowtoniuk, Walter E.,Rueffer, Michelle E.,MacFarland, Darren K.
, p. 151 - 154 (2004)
Synthesis and characterization of a novel phase-transfer catalyst, 6,6′ di(triethylammoniummethyl)-2,2′-dihexyloxybi-1,1′- naphthalene, are reported. Preliminary catalytic studies on the alkylation of a glycine derivative show the catalyst to be an effect
Stereoselective deconjugation of macrocyclic α,β-unsaturated esters by sequential amidation and olefin transposition: Application to enantioselective phase-transfer catalysis
Homberg, Alexandre,Hrdina, Radim,Vishe, Mahesh,Guénée, Laure,Lacour, Jér?me
, p. 6905 - 6910 (2019)
The stereoselective synthesis of chiral macrocycles bearing two aliphatic amide functional groups is reported. After the amidation mediated by TBD, a guanidine derivative, the olefin transposition step is performed with a slight excess of t-BuOK. The products are afforded in moderate to good combined yields (up to 59%) and with an excellent syn diastereoselectivity (dr > 49:1). Introducing enantiopure α-branched substituents was possible and it resulted in mixtures of diastereomers, which could be tested as phase-transfer catalysts using the formation of a phenylalanine analog as a test reaction (up to 43% ee). A clear matched-mismatched situation was observed in the two diastereomeric series.
Phase-Transfer Catalysis via a Proton Sponge: A Bifunctional Role for Biscyclopropenimine
Belding, Lee,Stoyanov, Peter,Dudding, Travis
, p. 553 - 558 (2016/01/25)
The use of a bis(diisopropylamino)cyclopropenimine-substituted bis-protonated proton sponge as a bifunctional phase-transfer catalyst is reported. Experimental studies and DFT calculations suggest it operates simultaneously as a hydrogen bond donor and a
Rate Acceleration of Solid-Liquid Phase-Transfer Catalysis by Rotor-Stator Homogenizer
Kano, Taichi,Aota, Yusuke,Maruoka, Keiji
supporting information, p. 2996 - 2999 (2016/09/16)
A rotor-stator homogenizer was found to be an effective mixing tool that accelerated solid-liquid phase-transfer reactions. In the asymmetric alkylation under phase-transfer conditions using the homogenizer, a considerably high turnover frequency was observed. (Figure presented.).
