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Home
Prof. Newcomb
Research Group
Research Projects
Facilities
Publications
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Recent publications from the group
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Kinetics and Activation Parameters for Oxidations
of Styrene by Compounds I from the Cytochrome P450BM-3
(CYP102A1) Heme Domain and from CYP119, X. Yuan, Q. Wang, J. H.
Horner, X. Sheng, M. Newcomb, Biochemistry, 2009, 48,
9140-9146.
bi901258m |
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N-Heterocyclic Carbene Boryl Radicals: A
New Class of Boron-Centered Radical, S.-H. Ueng, A.
Solovyev, X. Yuan, S. J. Geib, L. Fensterbank, E. Lacote, M. Malacria,
M. Newcomb, J. C. Walton, D. P. Curran, J. Am. Chem. Soc.,
2009, 131, 11256-11262.
ja904103x |
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Quantitative Production of Compound I from a
Cytochrome P450 Enzyme at Low Temperatures. Kinetics, Activation
Parameters, and Kinetic Isotope Effects for Oxidation of Benzyl Alcohol,
Q. Wang, X. Sheng, J. H. Horner, M. Newcomb, J. Am. Chem. Soc.,
2009, 131, 10629-10636.
ja9031105 |
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Production of a Putative Iron(V)-Oxo
Corrole Species by Photo-Disproportionation of a bis-Corrole
Diiron(IV) m-Oxo Dimer; Implication for a Green Oxidation Catalyst,
D. N. Harischandra, G. Lowery, R. Zhang, M. Newcomb, Org. Lett.,
2009, 11, 2089-2092.
ol900480p |
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Kinetics of Oxidation of Benzphetamine by
Compounds I of Cytochrome P450 2B4 and Its Mutants, X. Sheng, H.
Zhang, S.-C. Im, J. H. Horner, L. Waskell, P. F. Hollenberg, M. Newcomb,
J. Am. Chem. Soc., 2009, 131, 2971-2976.
ja808982g |
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Kinetic Isotope Effects in Hydroxylation Reactions
Effected by Cytochrome P450 Compounds I Implicate Multiple Electrophilic
Oxidants for P450-Catalyzed Oxidations, X. Sheng, H. Zhang, P. F.
Hollenberg, M. Newcomb, Biochemistry, 2009, 48,
1620-1627.
bi802279d |
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Highly Reactive Porphyrin-Iron-Oxo Derivatives
Produced by Photolyses of Metastable Porphyrin-Iron(IV) Diperchlorates,
Z. Pan, Q. Wang, X. Sheng, J. H. Horner, M. Newcomb, J.
Am. Chem. Soc., 2009, 131, 2621-2628.
ja807847q |
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Formation of Stable and Metastable
Porphyrin- and Corrole-Iron(IV) Complexes and Isomerizations to Iron(III)
Macrocycle Radical Cations, Z. Pan, D. Harischandra, M. Newcomb,
J. Inorg. Biochem., 2009, 103, 174-181.
j.jinorgbio.2009.09.017 |
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The Grignard Reagent Formation Reaction of
2-Chloro-1,1,1-triphenylethane Revisited, F. Bickelhaupt, M.
Newcomb, C. B. DeZutter, H. J. R. de Boer, Eur. J. Org. Chem.,
2008, 6225-6231.
ejoc.200800790. |
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Rate Constants for Hydrogen
Atom Transfer Reactions from Bis(cyclopentadienyl)-titanium(III)
Chloride-Complexed Water and Methanol to an Alkyl Radical,
J. Jin, M. Newcomb, J. Org. Chem. 2008, 73,
7901-7905.
jo801869r
(JOC Featured Article) |
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Spectra and Kinetic Studies of the Compound I
Derivative of Cytochrome P450 119, X. Sheng, J. H. Horner, M.
Newcomb, J. Am. Chem. Soc., 2008, 130, 13310-13320.
ja802652b |
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Rate Constants and Arrhenius Functions for Ring
Opening of a Cyclobutylcarbinyl Radical Clock and for Hydrogen Atom
Transfer from the Et3B-MeOH Complex, J. Jin, M. Newcomb,
J. Org. Chem. 2008, 73, 4740-4742.
jo800500e |
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Tunneling in C-H Oxidation Reactions by an
Oxoiron(IV) Porphyrin Radical Cation: Direct Measurements of Very
Large H/D Kinetic Isotope Effects, Z. Pan, J. H. Horner, M. Newcomb,
J. Am. Chem. Soc., 2008, 130, 7776-7777.
ja802484n |
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Rate Constants for 1,5- and 1,6-Hydrogen Atom
Transfer Reactions of Mono-, Di-, and Tri-Aryl-Substituted Donors,
Models for Hydrogen Atom Transfers in Polyunsaturated Fatty Acid
Radicals, C. B. DeZutter, J. H. Horner, M. Newcomb, J. Phys.
Chem. A 2008, 112, 1891-1896.
jp710750f |
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X-Ray Absorption Spectroscopic Characterization of
a Cytochrome P450 Compound II Derivative, M.
Newcomb, J. A. Halgrimson, J. H. Horner, E. C. Wasinger, L. X. Chen, S.
G. Sligar, Proc. Natl. Acad. Sci. USA, 2008, 105,
8179-8184.
pnas0708299105 |
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Laser Flash Photolysis Generation of High-Valent
Transition Metal-Oxo Species: Insights from Kinetic Studies in
Real Time, R. Zhang, M.
Newcomb, Acc. Chem. Res. 2008, 41, 468-477.
ar700175k |
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Kinetics and Mechanism of Oxidation Reactions of
Prophyrin-Iron(IV)-Oxo Intermediates, Z. Pan, M.
Newcomb, Inorg. Chem. 2007, 46, 6767-6774.
ic700395j |
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Rate Constants for Reactions of Alkyl Radicals
with Water and Methanol Complexes of Triethylborane, J. Jin, M.
Newcomb, J. Org. Chem. 2007, 72, 5098-5103.
jo070336s |
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Compatible Injection and Detection Systems for
Studying the Kinetics of Excess Electron Transfer, L. Xu, J. Jin,
M. Lal, P. Daublain, M. Newcomb, Org. Lett. 2007, 9,
1837-1840. ol070593j |
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Kinetic Studies of a Fast, Reversible Alkene Radical Cation
Cyclization Reaction, J. H. Horner, M. Newcomb, J. Org. Chem.
2007, 72, 1609-1616.
jo061868w |
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Products from Enzyme-Catalyzed Oxidations of Norcarenes, M.
Newcomb, D. S. P. Lansakara-P., H.-Y. Kim, R. E. P. Chandrasena, S. J.
Lippard, L, G. Beauvais, L. J. Murray, V. Izzo, P. F. Hollenberg, M. J.
Coon, J. Org. Chem. 2007, 72, 1128-1133.
jo061864r |
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Desaturase Reactions Complicate the Use of Norcarane as a Mechanistic
Probe. Unraveling the Mixture of Twenty-Plus Products Formed in
Enzyme-Catalyzed Oxidations of Norcarane, M. Newcomb, R. E. P.
Chandrasena, D. S. P. Lansakara-P., H.-Y. Kim, S. J. Lippard, L, G.
Beauvais, L. J. Murray, V. Izzo, P. F. Hollenberg, M. J. Coon, J.
Org. Chem. 2007, 72, 1121-1127.
jo061865j |
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Photochemical Production of a Highly Reactive Porphyrin-Iron-Oxo
Species, Z. Pan, R. Zhang, L. W.-M. Fung, M. Newcomb, Inorg.
Chem. 2007, 46, 1517-1519. ic061972w |
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Radical Heterolysis Reactions. Dynamics of
Formation, Collapse, and Solvation of Ion Pairs Determined by a
Competition Kinetic Method, J. H. Horner, M. Lal, M. Newcomb,
Org. Lett. 2006, 8, 5497-5500.
ol062242v |
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Kinetics of Two-Electron Oxidations by the
Compound I Derivative of Chloroperoxidase, a Model for Cytochrome P450
Oxidants, R. Zhang, N. Nagraj, D. S. P. Lansakara-P., L. P. Hager,
M. Newcomb, Org. Lett. 2006, 8, 2731-2734.
ol060762k |
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Cytochrome P450 Compound I, M. Newcomb,
R. Zhang, R. E. P. Chandrasena, J. A. Halgrimson, J. H. Horner, T. M.
Makris, S. G. Sligar, J. Am. Chem. Soc. 2006, 128,
4580-4581.
ja060048y |
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Kinetic Studies of Reactions of Iron(IV)-Oxo
Prophyrin Radical Cations with Organic Reductants, Z. Pan, R. Zhang,
M. Newcomb, J. Inorg. Biochem. 2006, 100, 524-532.
(LINK) |
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Laser Flash Photolysis Production of Metal-Oxo
Derivatives and Direct Kinetic Studies of Their Oxidation Reactions,
M. Newcomb, R. Zhang, Z. Pan, D. N. Harischandra, R. E. P. Chandrasena,
J. H. Horner, E. Martinez II,
Catalysis Today 2006, 117, 98-104.
(LINK) |
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Rate Constants for Anilidyl Radical Cyclization
Reactions, E. Martinez II, M. Newcomb, J. Org. Chem. 2006,
71, 557-561.
jo051953o |
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Highly Reactive Electrophilic Oxidants in
Cytochrome P450 Catalysis, M. Newcomb, R. E. P. Chandrasena,
Biochem. Biophys. Res. Commun. 2005, 338, 394-403.
(LINK) |
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Acid-, Base-, and Lewis Acid-Catalyzed Heterolysis
of Methoxide from an alpha-Hydroxy-beta-methoxy Radical. Models for
Reactions Catalyzed by Coenzyme B12-Dependent Diol Dehydratase, L.
Xu, M. Newcomb, J. Org. Chem. 2005, 70, 9296-9303.
jo051349d |
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Photochemical Generation of a Highly Reactive
Iron-Oxo Intermediate. A True Iron(V)-Oxo Species?, D. N.
Harischandra, R. Zhang, M. Newcomb, J. Am. Chem. Soc. 2005,
127, 13776-13777.
ja0542439 |
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Laser Flash Photolysis Production of Compound I
and Its Relatives, M. Newcomb, R. Zhang, R. E. P. Chandrasena, J. H.
Horner, E. Martinez II, D. N. Harischandra, Z. Pan, Proc. 14th Intl.
Conf. Cytochrome P450, 2005, 41-47. |
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Laser Flash Photolysis Generation and Kinetic
Studies of Corrole-Manganese(V)-Oxo Intermediates, R. Zhang, D. N.
Harischandra, M. Newcomb, Chem. Eur. J. 2005, 11,
5713-5720. (LINK) |
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Formation of Compounds I by Photo-Oxidation of
Compounds II, R. Zhang, R. E. P. Chandrasena, E. Martinez II, J. H.
Horner, M. Newcomb, Org. Lett. 2005, 7, 1193-1195.
ol050296j |
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Laser Flash Photolysis Generation and Kinetic Studies of Porphyrin
Manganese-Oxo Intermediates. Rate Constants for Oxidations Effected by
Porphyrin-MnV-Oxo Species and Apparent Disproportionation
Equilibrium Constants for Porphyrin-MnIV-Oxo Species,
R. Zhang, J. H. Horner, M. Newcomb, J. Am. Chem. Soc. 2005,
127, 6573-6582.
ja045042s |
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Lewis Acid Catalysis in Heterolysis Reactions of
Glycol Ether Radicals Mimicking Diol Dehydratase-Catalyzed Reactions,
N. Miranda, L. Xu, M. Newcomb, Org. Lett. 2004, 6,
4511-4514.
ol0481131 |
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Kinetics of Radical Heterolysis Reactions Forming
Alkene Radical Cations, J. H. Horner, L. Bagnol, M. Newcomb, J.
Am. Chem. Soc. 2004, 126, 14979-14987.
ja046089g |
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Solvent Polarity Effects and Limited Acid
Catalysis in Rearrangements of Model Radicals for the Methylmalonyl-CoA
Mutase- and Isobutyryl-CoA Mutase-Catalyzed Isomerization Reactions,
P. Daublain, J. H. Horner, A. Kuznetsov, M. Newcomb, J. Am. Chem.
Soc. 2004, 126, 5368-5369.
ja049913+ |
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An Accelerating-Reporting Group for Studies of
Radical Heterolysis Reactions and Its Application in an Acid-Catalyzed
Fragmentation Reaction of an a,b-Dimethoxy
Radical, M. Newcomb, N. Miranda, J.
Org. Chem. 2004, 69, 6515-6520.
jo0357972 |
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Hydroxylation by the Hydroperoxy-Iron Species in
Cytochrome P450 Enzymes, R. E. P. Chandrasena, K. P. Vatsis, M. J.
Coon, P. F. Hollenberg, M. Newcomb, J. Am. Chem. Soc. 2004,
126, 115-126.
ja038237t |
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Direct Detection of Ion Pair
Formation and Collapse in a Migration Reaction of a
b-Phosphate Radical,
L. Bagnol, J. H. Horner, M. Newcomb, Org. Lett. 2003, 5,
5055-5058.
ol036052l |
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Laser Flash Photolysis Formation and Direct
Kinetic Studies of Manganese(V)-oxo Porphyrin Intermediates, R.
Zhang, M. Newcomb, J. Am. Chem. Soc. 2003, 125,
12418-12419.
ja0377448 |
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Carboxylate-Substituted
Radicals from Phenylselenide Derivatives. Designs on Models for
Coenzyme B12-Dependent Enzyme-Catalyzed Rearrangements,
N. Miranda, P. Daublain, J. H. Horner, M. Newcomb, J. Am. Chem. Soc.
2003, 125, 5260-5261.
ja034888d |
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Kinetic Isotope Effects Implicate Two Electrophilic Oxidants in
Cytochrome P450-Catalyzed Hydroxylations, M. Newcomb, D. Aebisher,
R. Shen, R. E. P. Chandrasena, P. F. Hollenberg, M. J. Coon, J. Am.
Chem. Soc., 2003, 125, 6064-6065.
ja0343858 |
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Mechanistic Studies on the Hydroxylation of
Methane by Methane Monooxygenase, M-H. Baik, M. Newcomb, R. A.
Friesner, S. J. Lippard, Chem. Rev. 2003, 103,
2385-2419.
cr950244f |
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Efficient Production of Enol Ether Radical Cations by Heterolytic
Cleavage of b-Mesylate Radicals, E. Taxil,
L. Bagnol, J. H. Horner, M. Newcomb, Org. Lett. 2003, 5,
827-830.
ol034061o |
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Kinetic Results Implicating a Polar Radical
Reaction Pathway in the Rearrangement Catalyzed by
a-Methyleneglutarate
Mutase, M. Newcomb, N. Miranda, J. Am.
Chem. Soc. 2003, 125, 4080-4086.
ja028686d |
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Multiple Mechanisms and Multiple Oxidants in
P450-Catalyzed Hydroxylations, M. Newcomb, P. F. Hollenberg, M. J.
Coon, Arch. Biochem. Biophys. 2003, 409, 72-79.
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