Catalytic asymmetric cycloetherification via intramolecular oxy-Michael addition of enols
作者:Ryuichi Murata、Keisuke Asano、Seijiro Matsubara
DOI:10.1016/j.tet.2021.132381
日期:2021.9
compounds as oxygen nucleophiles. In particular, there are only a few reports on the oxy-Michael addition of the enol forms of carbonyl nucleophiles. In this study, we present the asymmetric cycloetherification of enols, which are generated in situ from enone-bearing ketones, using chiralbifunctionalorganocatalysts bearing amino and squaramide groups. This transformation chemo- and enantioselectively afforded
[EN] N-SUBSTITUTED-3-TRICYCLYL PIPERIDINE DERIVATIVES AS ANTICANCER AND NEUROPROTECTIVE AGENTS<br/>[FR] DÉRIVÉS DE 3-TRICYCLYL-PIPÉRIDINES N-SUBSTITUÉES UTILISÉS EN TANT QU'AGENTS ANTICANCÉREUX ET NEUROPROTECTEURS
申请人:ICAHN SCHOOL MED MOUNT SINAI
公开号:WO2021150697A1
公开(公告)日:2021-07-29
A genus of N-substituted-3-tricyclyl piperidine derivatives is disclosed. The compounds are of the following genus: The compounds induce FOXO1 transcription factor translocation to the nucleus by modulating PP2A and, as a consequence, exhibit anti-proliferative effects. They are useful in the treatment of a variety of disorders, including as a monotherapy in cancer treatment, or used in combination with other drugs to restore sensitivity to chemotherapy where resistance has developed.
Asymmetric Morita-Baylis-Hillman Reaction: Catalyst Development and Mechanistic Insights Based on Mass Spectrometric Back-Reaction Screening
作者:Patrick G. Isenegger、Florian Bächle、Andreas Pfaltz
DOI:10.1002/chem.201604616
日期:2016.12.5
Morita–Baylis–Hillman (MBH) reaction was developed. By massspectrometric back‐reactionscreening of quasi‐enantiomeric MBH products, an efficient bifunctional phosphine catalyst was identified that outperforms literature‐known catalysts in the MBH reaction of methyl acrylate with aldehydes. The close match between the selectivities measured for the forward and back reaction and kinetic measurements provided
Chiral 1,3-aminosquaramides derived from cis-2-benzamidocyclohexanecarboxylic acid as organocatalysts for asymmetric Michael addition reactions
作者:Koichi Kodama、Kazuhisa Maruyama、Takuji Hirose
DOI:10.1016/j.tet.2022.132750
日期:2022.4
Herein, chiral 1,3-aminosquaramides derivedfrom cis-2-benzamidocyclohexanecarboxylic acid, which is a chiral β-amino acid derivative, were synthesized and applied as bifunctional organocatalysts for asymmetric Michael addition reaction of 1,3-dicarbonyl compounds to β-nitrostyrenes. The catalyst structure and reaction conditions, such as solvent and temperature, were examined, and then, the optimized