Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Igor Likhotvorik"'
Publikováno v:
Synthesis. 50:2231-2234
A metal-free, environmentally benign oxidation of substituted sulfides directly to their corresponding sulfones is described. Using urea-hydrogen peroxide and phthalic anhydride in ethyl acetate clean conversion into the sulfone was achieved without
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2910bbf7ad1a6b2dea32758f96927387
https://doi.org/10.1055/s-0037-1609446
https://doi.org/10.1055/s-0037-1609446
Autor:
Celine Ventre, Zhendong Zhu, Eunju Lee Tae, Francis Ford, and Eric Tippmann, Matthew S. Platz, Igor Likhotvorik
Publikováno v:
The Journal of Physical Chemistry A. 105:10146-10154
B3LYP density functional calculations with the 6-31G* basis set predict that 3-noradamantylcarbene 7 rearranges to adamantene 9 and protoadmant-3-ene 10 over barriers of 0.35 and 7.84 kcal/mol, respectively, after zero-point energy correction. The sa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4884a11c6c818deaa40dd2d09aa67086
https://doi.org/10.1021/jp010907z
https://doi.org/10.1021/jp010907z
Autor:
Brian T. Hill, Eric M. Tippmann, Matthew S. Platz, Zhendong Zhu, Eunju Lee Tae, Igor Likhotvorik
Publikováno v:
Journal of the American Chemical Society. 123:6061-6068
Photolysis (254 nm) of methyl 8-chloro-3a,7a-methanoindan-8-carboxylate (5) in argon at 14 K produces carbomethoxychlorocarbene (6) as a persistent species. The IR and UV-vis spectra of the carbene were recorded and analyzed with the aid of density f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ef1435172e5f40c6b88fad3a34ebc40
https://doi.org/10.1021/ja004235m
https://doi.org/10.1021/ja004235m
Publikováno v:
The Journal of Physical Chemistry A. 105:3752-3756
Laser flash photolysis (308 nm) of carbomethoxy-2-naphththyldiazomethane in deoxygenated Freon-113 (CF2ClCFCl2) solution containing tetrahydrofuran (THF) produces a transient spectrum with a sharp absorption maximum at 330 nm and a shoulder at 375 nm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::affd454970e220c29772898475560a94
https://doi.org/10.1021/jp001726k
https://doi.org/10.1021/jp001726k
Autor:
Nina P. Gritsan, Weston Thatcher Borden, Nil Çelebi, and Carl R. Kemnitz, William L. Karney, Igor Likhotvorik, Meng-Lin Tsao, Matthew S. Platz
Publikováno v:
Journal of the American Chemical Society. 123:1425-1433
On the basis of the open-shell electronic structure of the lowest-singlet state of phenylnitrene, it is predicted that substitution of a radical-stabilizing cyano group at an ortho carbon should facilitate cyclization at that carbon, whereas cyano su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fa58a43c8e04c96ca19fe299c7b1c59
https://doi.org/10.1021/ja002594b
https://doi.org/10.1021/ja002594b
Publikováno v:
Journal of the American Chemical Society. 121:2883-2890
Photolysis of methyl 2-diazo(2-naphthyl)acetate releases singlet 2-naphthyl(carbomethoxy)carbene. The singlet carbene relaxes to the lower energy triplet state within 350 ps−1 ns. Singlet to triplet carbene intersystem crossing is much faster than
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::316cff699843eb2895077131e42889dd
https://doi.org/10.1021/ja983279g
https://doi.org/10.1021/ja983279g
Autor:
Richard P. Johnson, Igor Likhotvorik, Matthew S. Platz, Mary M. Kirchhoff, Sarah C. Abbot, Marc Robert
Publikováno v:
The Journal of Physical Chemistry A. 102:1507-1513
Previously we have studied the photochemistry of alkylchlorodiazirines using laser flash photolysis methods and the pyridine ylide technique (White et al. J. Org. Chem. 1992, 17, 2841). The yield o...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d8d9a0e9625ed96f29c48a15a2fb798
https://doi.org/10.1021/jp972464y
https://doi.org/10.1021/jp972464y
Publikováno v:
Tetrahedron Letters. 43:7-9
Laser flash photolysis (308 nm) of precursor 3 releases chlorocyanocarbene which can be trapped with pyridine.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::502b2e08056d79e3092d889b43416c03
https://doi.org/10.1016/s0040-4039(01)02086-x
https://doi.org/10.1016/s0040-4039(01)02086-x
Publikováno v:
Tetrahedron Letters. 42:3049-3051
A new non-nitrogenous precursor of dimethylcarbene has been synthesized. Photolysis of 10,10′-dimethyltricyclo[4.3.1.0 1,6 ]deca-2,4-diene in solution with 254 nm light produces dimethylcarbene. Previously unknown intermolecular reactions of dimeth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae209d3e033b019bbd777162dd38725e
https://doi.org/10.1016/s0040-4039(01)00359-8
https://doi.org/10.1016/s0040-4039(01)00359-8
Publikováno v:
The Journal of Physical Chemistry A. 105:3039-3041
Photolysis (254 nm) of CF3N3 in pentane at 6−10 K produced a persistent electron paramagnetic resonance spectrum typical of a triplet nitrene centered at 8620 G. The spectrum (|D/hc| = 1.736 cm-1) is attributed to triplet CF3−N, and is very simil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49211b6ad915659a678661da3982b922
https://doi.org/10.1021/jp003660z
https://doi.org/10.1021/jp003660z