113036-75-2Relevant academic research and scientific papers
High-Pressure Asymmetric Michael Additions of Thiols, Nitromethane, and Methyl Oxoindancarboxylate to Enones
Sera, Akira,Takagi, Kazuhiro,Katayama, Hirohito,Yamada, Hiroaki
, p. 1157 - 1161 (1988)
Quinine- and quinidine-catalyzed asymmetric Michael additions of benzenethiols 3 to cyclohexenones 4 (reaction 1, Scheme I), of nitromethane (6) to chalcone (7) (reaction 2), and of methyl oxoindancarboxylate 9 to methyl vinyl ketone (10) (reaction 3) are
Synthetic and Organocatalytic Studies of Quinidine Analogues with Ring-Size Modifications in the Quinuclidine Moiety
Breman, Arjen C.,van der Heijden, Gydo,van Maarseveen, Jan H.,Ingemann, Steen,Hiemstra, Henk
supporting information, p. 14247 - 14256 (2016/09/23)
Six highly enantiopure analogues of [2.2.2] were synthesized with five- or seven-membered rings in the (original) quinuclidine skeleton. Five of these compounds were prepared through epoxide opening by a secondary cyclic amine, providing the nor- and homo
Interference of the surface of the solid on the performance of tethered molecular catalysts
Hong, Junghyun,Zaera, Francisco
experimental part, p. 13056 - 13065 (2012/10/08)
The catalytic performance of cinchonidine in the promotion of thiol additions to conjugated ketones was used as a probe to assess the tethering of molecular functionality onto solid surfaces using well-known "click" chemistry involving easy-to-react linke
Highly enantioselective organocatalytic sulfa-michael addition to α, β-unsaturated ketones
Rana, Nirmal K.,Selvakumar, Sermadurai,Singh, Vinod K.
supporting information; experimental part, p. 2089 - 2091 (2010/06/16)
"Chemical Equation Presented" A cinchona alkaloid-derived urea was found to be an efficient organocatalyst for catalyzing enantioselective conjugate addition between thiols and various α,β-unsaturated ketones to provide optically active sulfides with high
Asymmetrie ruthenium-catalyzed 1,4-additions of aryl thiols to enones
Badoiu, Andrei,Bernardinelli, Gerald,Besnard, Celine,Peter Kuendig
supporting information; experimental part, p. 193 - 200 (2010/04/25)
Well defined, stable, one-point binding ruthenium complexes 1 and 2 selectively bind and activate α,β-unsaturated carbonyl compounds for cycloaddition reactions. These mild Lewis acids catalyze asymmetric 1,4-addition reactions of aryl thiols to enones wi
Improved design of inherently chiral calix[4]arenes as organocatalysts
Shirakawa, Seiji,Shimizu, Shoichi
experimental part, p. 1217 - 1222 (2010/08/08)
Improvement of the design of inherently chiral calix[4]arenes as organocatalysts was accomplished via the introduction of a diarylmethanol structure. Novel, inherently chiral calix[4]arenes bearing a tertiary amine or a quaternary ammonium moiety, togethe
Synthesis and resolution of a multifunctional inherently chiral calix[4]arene with an ABCD substitution pattern at the wide rim: The effect of a multifunctional structure in the organocatalyst on enantioselectivity in asymmetric reactions
Shirakawa, Seiji,Kimura, Tomohiro,Murata, Shun-Ichi,Shimizu, Shoichi
experimental part, p. 1288 - 1296 (2009/06/28)
An efficient synthetic route to inherently chiral calix[4]arenes with an ABCD substitution pattern at the wide rim in the cone conformation was developed for the first time. For the synthesis of inherently chiral ABCD-type calix[4]arenes, first 5,11-dibro
Synthesis, optical resolution and enantiomeric recognition ability of novel, inherently chiral calix[4]arenes: Trial application to asymmetric reactions as organocatalysts
Shirakawa, Seiji,Moriyama, Akihiro,Shimizu, Shoichi
experimental part, p. 5957 - 5964 (2009/05/27)
Newly designed, inherently chiral calix[4]arenes containing amino phenol structures have been synthesized and resolved to optically pure forms. The enantiomeric recognition ability of one chiral calix[4]arene was examined with mandelic acid by 1/sup
Free bases of chiral N-substituted porphyrins as catalysts for asymmetric reaction
Ito, Akihiko,Konishi, Katsuaki,Aida, Takuzo
, p. 2585 - 2588 (2007/10/03)
Chiral N-substituted porphyrin free bases having a conformationally locked asymmetric nitrogen atom catalyzed Michael addition of thiophenols to cycloalkenones, where the reaction proceeded enantioselectively when the catalyst having a xylylene strap anch
