2025
Catalyst-Controlled Site-Selective and Epimer-Selective Hydrogenations of Thiostrepton
Peterson P, Mercado B, Miller S. Catalyst-Controlled Site-Selective and Epimer-Selective Hydrogenations of Thiostrepton. Journal Of The American Chemical Society 2025, 147: 17161-17169. PMID: 40358225, PMCID: PMC12126753, DOI: 10.1021/jacs.5c02720.Peer-Reviewed Original ResearchConceptsPhosphoramidite ligandAsymmetric hydrogenation methodMonodentate phosphoramidite ligandsStereoselectivity of reductionX-ray crystallographyStudies of ligandsModel substrateProtecting-groupLigand chiralityLigand scaffoldStereochemical outcomeAbsolute stereochemistryMild conditionsMultidimensional nuclear magnetic resonance methodsNuclear magnetic resonance methodsDehydroalanine residueHydrogenation methodLigandX-rayHydrogenStereoisomersStereochemistryControlled formationStericallyMagnetic resonance methodsEnantiocontrolled Cyclization to Form Chiral 7- and 8‑Membered Rings Unified by the Same Catalyst Operating with Different Mechanisms
Tampellini N, Mercado B, Miller S. Enantiocontrolled Cyclization to Form Chiral 7- and 8‑Membered Rings Unified by the Same Catalyst Operating with Different Mechanisms. Journal Of The American Chemical Society 2025, 147: 4624-4630. PMID: 39847512, PMCID: PMC11815475, DOI: 10.1021/jacs.4c17080.Peer-Reviewed Original ResearchApplication of asymmetric catalysisCyclization of substratesMedium-sized ringsSeven-membered ringEight-membered ringAxis of chiralitySingle bond axisChiral catalystsOrganocatalytic strategyAsymmetric catalysisCyclization methodStereogenic atomsCyclization reactionCyclization stepRing sizeMild conditionsCyclizationCatalystRingChiralityReactionMechanistic paradigmEnantiocontrolStereocontrolStericallySynthesis of Oxabicyclo[3.2.1]octan-3-ol Scaffold via Burgess Reagent Mediated Cyclodehydration of δ‑Diols under Acidic Conditions
Elmansy M, dos Remedios J, Silverman R. Synthesis of Oxabicyclo[3.2.1]octan-3-ol Scaffold via Burgess Reagent Mediated Cyclodehydration of δ‑Diols under Acidic Conditions. Organic Letters 2025, 27: 640-644. PMID: 39761354, PMCID: PMC11901898, DOI: 10.1021/acs.orglett.4c04473.Peer-Reviewed Original Research
2024
On Optimality of Mallows Model Averaging
Peng J, Li Y, Yang Y. On Optimality of Mallows Model Averaging. Journal Of The American Statistical Association 2024, 120: 1152-1163. DOI: 10.1080/01621459.2024.2402566.Peer-Reviewed Original ResearchNon-nested setAsymptotic optimalityModel selectionCp criterionMallows model averageCandidate modelsOptimal convex combinationMallows' Cp criterionMinimax adaptiveSampling inequalitiesMallows modelConvex combinationTheoretical findingsOptimal riskSupplementary materialsMA estimatesModel averagingTheoretical justificationModel weightsAverage modelNested setMild conditionsMinimaxEstimationInequalityRoom temperature catalytic upgrading of unpurified lignin depolymerization oil into bisphenols and butene-2
Subbotina E, Souza L, Zimmerman J, Anastas P. Room temperature catalytic upgrading of unpurified lignin depolymerization oil into bisphenols and butene-2. Nature Communications 2024, 15: 5892. PMID: 39003256, PMCID: PMC11246530, DOI: 10.1038/s41467-024-49812-x.Peer-Reviewed Original ResearchButene-2Bio-based carbon contentSource of renewable aromaticsGlass transition temperatureSynthetic utilityOlefin metathesisReductive catalytic fractionationBio-based carbonCatalyst loadingTarget monomersMild conditionsHydrogen pressureThermal stabilityRenewable aromaticsLoss of functionTransition temperatureCatalytic fractionationLignin depolymerizationCatalytic upgradingConvert ligninMonomerUpgrading methodsBisphenolHigh temperatureRoll-to-roll fabrication of large-area metal–organic framework-based membranes for high-performance aqueous separations
Ji Y, Gu B, Huo H, Xie S, Peng H, Zhang W, Yin M, Xiong B, Lu H, Villalobos L, Zhao Q, Gao C, Elimelech M, An Q. Roll-to-roll fabrication of large-area metal–organic framework-based membranes for high-performance aqueous separations. Nature Water 2024, 2: 183-192. DOI: 10.1038/s44221-023-00184-4.Peer-Reviewed Original ResearchMetal-organic frameworksRoll-to-roll fabricationCrystallization strategyMetal-ligand interactionsMOF-based membranesEfficient water purificationSolute-solute separationPurification of pharmaceuticalsSolute-solute selectivityHigh water permeanceSpiral wound membrane modulesDye desalinationMild conditionsHybrid membranesAqueous separationsSeparation performanceWater permeanceRemarkable stabilityMembrane moduleWater purificationScalable manufacturingUltra-thinInterconnection structureCrystalPolydopamine nanoparticles
2022
Catalytic Enantioselective Sulfur Alkylation of Sulfenamides for the Asymmetric Synthesis of Sulfoximines
Greenwood NS, Champlin AT, Ellman JA. Catalytic Enantioselective Sulfur Alkylation of Sulfenamides for the Asymmetric Synthesis of Sulfoximines. Journal Of The American Chemical Society 2022, 144: 17808-17814. PMID: 36154032, PMCID: PMC9650615, DOI: 10.1021/jacs.2c09158.Peer-Reviewed Original ResearchConceptsAsymmetric synthesisAlkylation productsChiral sulfur centerChiral rhodium catalystNew asymmetric synthesisDifferent binding interactionsChiral sulfoximinesChallenging preparationDiazo compoundsRhodium catalystSingle enantiomerNitrogen substituentsSulfur centerMild conditionsSulfur alkylationBinding interactionsRacemic mixtureDrug discoveryEnantiomeric ratioAlkylationHigh yieldsComplete retentionSynthesisKey stepEnantiomersC–H bond activation and sequential addition to two different coupling partners: a versatile approach to molecular complexity
Brandes DS, Ellman JA. C–H bond activation and sequential addition to two different coupling partners: a versatile approach to molecular complexity. Chemical Society Reviews 2022, 51: 6738-6756. PMID: 35822540, PMCID: PMC9364435, DOI: 10.1039/d2cs00012a.Peer-Reviewed Original ResearchConceptsAddition reactionH bondsMolecular complexityAtom-economical reactionH bond activationH bond additionSingle reaction sequenceBond activationΣ-bondBond additionCarbonyl compoundsΠ bondsΠ-systemType of functionalityStereochemical controlCoupling partnersMild conditionsSubsequent couplingReaction sequenceVersatile approachDifferent coupling partnersReagentsSequential additionMore complex structuresReaction
2021
An azo dye for photodynamic therapy that is activated selectively by two-photon excitation
Juvekar V, Lim C, Lee D, Park S, Song G, Kang H, Kim H. An azo dye for photodynamic therapy that is activated selectively by two-photon excitation. Chemical Science 2021, 12: 427-434. PMID: 34163605, PMCID: PMC8178981, DOI: 10.1039/d0sc05686c.Peer-Reviewed Original ResearchTwo-photon excitationReactive oxygen species (ROS)-generation abilityNegligible dark toxicityType I processAzo groupOrganic dyesMild conditionsTwo-photon photodynamic therapyEfficient PDT applicationsAzo dyesROS generation abilitySmall moleculesTP-PDTAzoPDT propertiesDyePDT applicationsDark toxicityTwo-photonPhotosensitizerPhotodynamic therapyI processGeneration abilityExcitationTreatment of cancer
2019
α-Branched amines by catalytic 1,1-addition of C–H bonds and aminating agents to terminal alkenes
Maity S, Potter TJ, Ellman JA. α-Branched amines by catalytic 1,1-addition of C–H bonds and aminating agents to terminal alkenes. Nature Catalysis 2019, 2: 756-762. PMID: 32879907, PMCID: PMC7462361, DOI: 10.1038/s41929-019-0330-7.Peer-Reviewed Original ResearchTerminal alkenesH bond substratesOne-step synthesisHigh functional group compatibilityFunctional group compatibilityChiral catalystsBranched aminesFeedstock chemicalsConvergent synthesisH bondsAsymmetric synthesisN bondAddition pathwayRhodium precatalystGroup compatibilityMild conditionsBond substratesIntermolecular formationDrug structureAminesSynthesisAlkenesClinical candidatesBondsΑ-methyl
2016
Ester Hydrogenation Catalyzed by CNN-Pincer Complexes of Ruthenium
Kim D, Le L, Drance M, Jensen K, Bogdanovski K, Cervarich T, Barnard M, Pudalov N, Knapp S, Chianese A. Ester Hydrogenation Catalyzed by CNN-Pincer Complexes of Ruthenium. Organometallics 2016, 35: 982-989. DOI: 10.1021/acs.organomet.6b00009.Peer-Reviewed Original ResearchDehydrogenation of primary alcoholsCatalytic turnoverComplexes of rutheniumHydrogenation of estersMethyl esterEster hydrogenationRuthenium complexesLigand structureReaction conditionsInactive catalystsMild conditionsBenzyl alcoholPrimary alcoholsReaction mixtureHydrogenReverse reactionLigandEsterCatalystDehydrogenationBase-catalyzed transesterificationBenzylRutheniumReactionHexyl esterPyroacm Resin: An Acetamidomethyl Derived Resin for Solid Phase Synthesis of Peptides through Side Chain Anchoring of C‑Terminal Cysteine Residues
Juvekar V, Gong Y. Pyroacm Resin: An Acetamidomethyl Derived Resin for Solid Phase Synthesis of Peptides through Side Chain Anchoring of C‑Terminal Cysteine Residues. Organic Letters 2016, 18: 836-839. PMID: 26845647, DOI: 10.1021/acs.orglett.6b00115.Peer-Reviewed Original ResearchConceptsSide-chain anchoringSolid phase synthesis of peptidesSynthesis of model peptidesSolid phase synthesisSynthesis of peptidesBoc protocolMild conditionsPeptide synthesisModel peptidesChain anchoringCysteine residuesC-terminal cysteine residueAcetamidomethylSynthesisTargeting peptideFmocBocChlorideResinA new method for the synthesis of β-cyano substituted porphyrins and their use as sensitizers in photoelectrochemical devices
Antoniuk-Pablant A, Terazono Y, Brennan B, Sherman B, Megiatto J, Brudvig G, Moore A, Moore T, Gust D. A new method for the synthesis of β-cyano substituted porphyrins and their use as sensitizers in photoelectrochemical devices. Journal Of Materials Chemistry A 2016, 4: 2976-2985. DOI: 10.1039/c5ta07226c.Peer-Reviewed Original ResearchPhotoelectrosynthetic cellsWater oxidationNew synthetic methodSolar cellsSensitive functional groupsHigh positive potentialsElectrochemical propertiesRedox mediatorSynthetic methodZinc porphyrinMost porphyrinsPhotoelectrochemical devicesFunctional groupsMild conditionsPresence of TrisPorphyrinsPotential candidateNanoparticulate TiOSensitizersOxidationPositive potentialsDyeMoleculesImproved yieldPhotocurrent
2014
Co( ii ), a catalyst for selective conversion of phenyl rings to carboxylic acid groups
Sinha S, Campos J, Brudvig G, Crabtree R. Co( ii ), a catalyst for selective conversion of phenyl rings to carboxylic acid groups. RSC Advances 2014, 4: 49395-49399. DOI: 10.1039/c4ra10510a.Peer-Reviewed Original Research
2011
Iridium-Catalyzed Hydrogenation of N-Heterocyclic Compounds under Mild Conditions by an Outer-Sphere Pathway
Dobereiner GE, Nova A, Schley ND, Hazari N, Miller SJ, Eisenstein O, Crabtree RH. Iridium-Catalyzed Hydrogenation of N-Heterocyclic Compounds under Mild Conditions by an Outer-Sphere Pathway. Journal Of The American Chemical Society 2011, 133: 7547-7562. PMID: 21510610, DOI: 10.1021/ja2014983.Peer-Reviewed Original ResearchMild conditionsHomogeneous iridium catalystN-heterocyclic compoundsOuter-sphere mechanismOuter-sphere pathwayInner-sphere mechanismHydrogenation of quinolineUnprecedentedly mild conditionsIridium hydrideIridium-catalyzed hydrogenationCoordination geometryLigand setUnhindered substratesCatalyst precursorsSequential protonCatalytic experimentsCatalytic reactionIridium catalystDFT calculationsDihydride complexCatalyst activityDFT studyHydride transferMechanistic proposalComplex show
2006
Generalized score test of homogeneity for mixed effects models
Zhu H, Zhang H. Generalized score test of homogeneity for mixed effects models. The Annals Of Statistics 2006, 34: 1545-1569. DOI: 10.1214/009053606000000380.Peer-Reviewed Original ResearchTest statisticsAsymptotic distributionRandom quadratic formsGeneralized score testQuadratic formInvariance principleScore testTest of homogeneityLatent variable modelsSimulation studyResampling procedureRestrictive assumptionsEmpirical performanceHomogeneity hypothesisTheoretical resultsVariance componentsVariable modelTest procedureBiomedical studiesMild conditionsInvarianceOverdispersionImportant problemsAssumptionsObservational data
2004
Asymmetric Synthesis of Amines with tert-Butanesulfinamide and Its Application
Kochi T, Mukade T, Ellman J. Asymmetric Synthesis of Amines with tert-Butanesulfinamide and Its Application. Journal Of Synthetic Organic Chemistry Japan 2004, 62: 128. DOI: 10.5059/yukigoseikyokaishi.62.128.Peer-Reviewed Original Research
This site is protected by hCaptcha and its Privacy Policy and Terms of Service apply