1050651-07-4Relevant academic research and scientific papers
Adventures in Atropisomerism: Total Synthesis of a Complex Active Pharmaceutical Ingredient with Two Chirality Axes
Beutner, Gregory,Carrasquillo, Ronald,Geng, Peng,Hsiao, Yi,Huang, Eric C.,Janey, Jacob,Katipally, Kishta,Kolotuchin, Sergei,La Porte, Thomas,Lee, Andrew,Lobben, Paul,Lora-Gonzalez, Federico,Mack, Brendan,Mudryk, Boguslaw,Qiu, Yuping,Qian, Xinhua,Ramirez, Antonio,Razler, Thomas M.,Rosner, Thorsten,Shi, Zhongping,Simmons, Eric,Stevens, Jason,Wang, Jianji,Wei, Carolyn,Wisniewski, Steven R.,Zhu, Ye
, p. 3736 - 3740 (2018)
A strategy to prepare compounds with multiple chirality axes, which has led to a concise total synthesis of compound 1A with complete stereocontrol, is reported.
Development of a Kilogram-Scale Process for the Enantioselective Synthesis of 3-Isopropenyl-cyclohexan-1-one via Rh/DTBM-SEGPHOS-Catalyzed Asymmetric Hayashi Addition Enabled by 1,3-Diol Additives
Simmons, Eric M.,Mudryk, Boguslaw,Lee, Andrew G.,Qiu, Yuping,Razler, Thomas M.,Hsiao, Yi
, p. 1659 - 1667 (2017)
The development of a scalable process for the Rh-catalyzed asymmetric 1,4-addition of (isopropenyl)pinacolboronate to 2-cyclohexen-1-one is reported. High-throughput ligand screening and initial optimization studies identified DTBM-SEGPHOS as an effective ligand along with a heptane/MeOH mixed solvent system. An inhibitory effect of the pinacol byproduct was identified, which could be mitigated by the addition of a 1,3-diol such as neopentyl glycol (npg). This process was demonstrated on 1 kg scale with 0.6 mol % Rh, producing (S)-1 in 82% yield and 99.6% ee, and was successfully scaled up at a vendor on 100 kg scale.
Enantioselective rhodium(I)-triethylamine catalyzed addition of potassium isopropenyl trifluoroborate to enones
Lalic, Gojko,Corey
, p. 4894 - 4896 (2008)
A general process is reported for the highly enantioselective 1,4-addition of isopropenyl trifluoroborate to cyclic enones under catalysis by a chiral Rh(I) complex and triethylamine at room temperature.
A Failed Late-Stage Epimerization Thwarts an Approach to Ineleganolide
Horn, Evan J.,Silverston, Joel S.,Vanderwal, Christopher D.
, p. 1819 - 1838 (2016)
Significant efforts were made to complete a synthesis of the complex norcembranoid ineleganolide via a seemingly attractive strategy involving late-stage creation of the central seven-membered ring. While the two key enantioenriched building blocks were made via high-yielding sequences and their convergent union was efficient, the critical C4-C5 bond of this sterically congested natural product could never be forged. Several interesting examples of unexpected acid-base behavior and unanticipated proximity-induced reactivity accounted for most of the problems in the execution of the synthesis plan.
Stereochemical Insights into the Anaerobic Degradation of 4-Isopropylbenzoyl-CoA in the Denitrifying Bacterium Strain pCyN1
Küppers, Julian,Becker, Patrick,Jarling, René,D?rries, Marvin,Caki?, Nevenka,Schmidtmann, Marc,Christoffers, Jens,Rabus, Ralf,Wilkes, Heinz
supporting information, p. 4722 - 4731 (2019/03/13)
The constitutions and absolute configurations of two previously unknown intermediates, (1S,2S,4S)-2-hydroxy-4-isopropylcyclohexane-1-carboxylate and (S)-3-isopropylpimelate, of anaerobic degradation of p-cymene in the bacterium Aromatoleum aromaticum pCyN
PROCESS FOR PREPARING TETRAHYDROCARBAZOLE CARBOXAMIDE COMPOUND
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Page/Page column 37-38, (2018/07/29)
Disclosed is a process for preparing Compound 8: (8) comprising the step of reacting Compound of 7: (7) wherein R is C1-8 alkyl or benzyl in the presence of a base. Also disclosed are intermediates and processes for preparing the intermediates.
COMPOUNDS FOR MODULATING MITOCHONDRIAL FUNCTION
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Paragraph 0185-0188, (2018/03/25)
Compounds and compositions that can modulate mitochondrial function in neuronal cells are provided herein, as are methods for using the compounds and compositions to treat or prevent conditions such as Alzheimer's disease.
Synthesis and AChE inhibitory activity of new chiral tetrahydroacridine analogues from terpenic cyclanones
Santos Pisoni, Diego dos,Sobieski da Costa, Jessé,Gamba, Douglas,Petzhold, Cesar Liberato,César de Amorim Borges, Antonio,Ceschi, Marco Antonio,Lunardi, Paula,Saraiva Gon?alves, Carlos Alberto
scheme or table, p. 526 - 535 (2010/04/06)
This work describes the enantioselective synthesis of a new series of terpenic chiral 9-aminotetrahydroacridine analogues. Several chiral ketones were synthesized from natural monoterpenes in an optically active form and subjected to the cyclodehydration reactions with anthranilonitrile in the presence of BF3·Et2O as catalyst. The 9-aminotetrahydroacridine analogues were tested as acetylcholinesterase (AChE) inhibitors. Based on qualitative structure-activity relationship some trends are suggested.
