91057-86-2Relevant academic research and scientific papers
Fe(III)-Catalyzed Diastereoselective Friedel-Crafts Alkylation-Hemiketalization-Lactonization Cascade for the Synthesis of Polycyclic Bridged 2-Chromanol Lactones
Borade, Balasaheb R.,Nomula, Rajesh,Gonnade, Rajesh G.,Kontham, Ravindar
, p. 2629 - 2633 (2019)
An unprecedented Fe(III)-catalyzed Friedel-Crafts alkylation-hemiketalization-lactonization cascade of electron-rich hydroxy arenes and distinctively functionalized unsaturated 4-keto esters is developed for the construction of polycyclic bridged 2-chroma
A 2 - (2-hydroxy-phenyl) - 2-phenoxyacetic acid ester synthetic method
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Paragraph 0031; 0032; 0033; 0034, (2016/11/09)
The invention discloses a synthetic method for 2-(2-hydroxyphenyl)-2-oxyacetate. The method comprises the following steps: taking cyclohexanone and glyoxylate as raw materials, producing an Aldol condensation reaction through catalysis at a room temperatu
INHIBITORS OF VIRAL REPLICATION, THEIR PROCESS OF PREPARATION AND THEIR THERAPEUTICAL USES
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Page/Page column 100, (2012/11/06)
The present invention relates to compounds, their use in the treatment or the prevention of viral disorders, including HIV.
Bronsted acid catalyzed asymmetric aldol reaction: A complementary approach to enamine catalysis
Pousse, Guillaume,Cavelier, Fabien Le,Humphreys, Luke,Rouden, Jacques,Blanchet, Jerome
scheme or table, p. 3582 - 3585 (2010/11/05)
A syn-enantioselective aldol reaction has been developed using Bronsted acid catalysis based on H8-BINOL-derived phosphoric acids. This method affords an efficient synthesis of various β-hydroxy ketones, some of which could not be synthesized u
Inorganic ammonium salts as catalysts for direct aldol reactions in the presence of water
Dziedzic, Pawel,Bartoszewicz, Agnieszka,Córdova, Armando
supporting information; experimental part, p. 7242 - 7245 (2010/02/28)
Inorganic ammonium salts catalyze the direct aldol reaction between unmodified ketones and aldehydes to furnish the corresponding β-hydroxy ketones in aqueous media. The reactions are highly chemoselective and operationally simple.
Organocatalytic enantioselective synthesis of secondary α-hydroxycarboxylates
Dodda, Rajasekhar,Zhao, Cong-Gui
, p. 1605 - 1609 (2008/02/05)
Enantioenriched secondary α-hydroxycarboxylates have been synthesized in good yields and enantioselectivities by using the cross-aldol reaction of ketones and ethyl glyoxylate with a proline-derived dipeptide as the catalyst. Georg Thieme Verlag Stuttgart
Divergent enantioselective synthesis of (-)-galanthamine and (-)-morphine
Trost, Barry M.,Tang, Weiping,Toste, F. Dean
, p. 14785 - 14803 (2007/10/03)
An efficient divergent synthetic strategy for the synthesis of the opiate and amaryllidaceae alkaloids emerges by employing a Pd-catalyzed asymmetric allylic alkylation (AAA) to set the stereochemistry. Three generations of syntheses of galanthamine are discussed in detail with particular focus on the scope of the palladium-catalyzed AAA reactions and intramolecular Heck reactions. The pivotal tricyclic intermediate is available in six steps from 2-bromovanillin and the monoester of methyl 6-hydroxycyclohexene-1-carboxylate. This intermediate requires only two steps to convert to (-)-galanthamine. Using a Heck vinylation, we found that the fourth ring of codeine/morphine could be formed. The final ring formation involves a novel visible light-promoted hydroamination. Thus, six steps are required to convert the pivotal tricyclic intermediate into codeine, which has been demethylated in high yield to morphine.
Synthetic utility of bowl-shaped tris(2,6-diphenyl-benzyl)silyl glyoxylate as a stable glyoxylate: Application to highly diastereoselective aldol reactions
Shirakawa, Seiji,Maruoka, Keiji
, p. 281 - 284 (2007/10/03)
A stable glyoxylate can be successfully applied to both syn- and anti-selective aldol reactions by using two different kinds of ordinary Lewis acids. Thus, treatment of bowl-shaped tris(2,6-diphenylbenzyl)silyl glyoxylate 1 with enol silyl ether under the influence of BF3·OEt2 gave syn-aldol product, while the use of TiCl4 afforded anti-aldol product with >97% selectivity.
