Zobrazeno 1 - 10
of 118
pro vyhledávání: '"Michael R. Crampton"'
Autor:
Michael R. Crampton, Ian A. Robotham
Publikováno v:
Journal of Physical Organic Chemistry. 26:1084-1089
A kinetic study is reported of the exchange reactions of substituted phenoxide ions with some ring-substituted 2,4,6-trinitrophenyl ethers in water. The βronsted diagrams formed by plotting log k, where k is the second-order rate constant for reacti
Autor:
Michael R. Crampton
Publikováno v:
Arene Chemistry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9430461d587d8f546313ee6dd3f9d48
https://doi.org/10.1002/9781118754887.ch6
https://doi.org/10.1002/9781118754887.ch6
Publikováno v:
Canadian Journal of Chemistry. 86:225-229
1H NMR studies in [2H6]-DMSO show that the carbanion 4 from bis(phenylsulfonyl)methane reacts with 4,6-dinitrobenzofuroxan to yield a σ-adduct that undergoes base-catalysed elimination to yield an alkene derivative. Rate constants, measured spectrop
Publikováno v:
European Journal of Organic Chemistry. 2007:1378-1383
Rate constants are reported for the reactions of a series of 1-chloro-, 1-fluoro- and 1-phenoxy-nitrobenzenes activated by CF3 or CN groups or by ring-nitrogen with n-butylamine, pyrrolidine or piperidine in acetonitrile. The results are compared wit
Autor:
Basim H. Asghar, Michael R. Crampton
Publikováno v:
Org. Biomol. Chem.. 5:1646-1654
1H NMR studies are reported of the reactions in [2H(6)]-DMSO of 4-nitrobenzofurazan, 2a, and its 7-chloro- and 7-methoxy-derivatives, 2b and 2c respectively, with anions derived from nitromethane, 3, nitroethane, 4, and 2-nitropropane, 5. The initial
Autor:
Michael R. Crampton, Basim H. Asghar
Publikováno v:
Journal of Physical Organic Chemistry. 20:702-709
H NMR studies in DMSO-d6 of the reaction of benzyltriflones, 2, with 4,6-dinitrobenzofuroxan, 4, indicate the formation, with or without the presence of added base, of anionic s-adducts. Spectra obtained from solutions of 2 and 4-nitrobenzofurazan, 6
Publikováno v:
Tetrahedron: Asymmetry. 17:1449-1456
VanadiumV(salen) complex 3 has been found to be an effective catalyst for the asymmetric addition of hydrogen cyanide (generated in situ from trimethylsilyl cyanide) to imines. The best results (up to 81% enantiomeric excess) were obtained for aromat
Autor:
Raju Mondal, Thomas A. Emokpae, Andrei S. Batsanov, Michael R. Crampton, Judith A. K. Howard, Chukwuemeka Isanbor
Publikováno v:
European Journal of Organic Chemistry. 2006:1222-1230
Rate constants are reported for reaction of 4-substituted 1-chloro-2,6-dinitrobenzenes 1, 6-substituted 1-chloro-2,4-dinitrobenzenes 2, and some of the corresponding 1-phenoxy derivatives, 3 and 4, with n-butylamine, pyrrolidine and piperidine in ace
Publikováno v:
Canadian Journal of Chemistry. 83:1222-1227
The reactions of four 4-nitrobenzofurazans (4a4d) substituted at the 7 position with (a) N-ethyl, (b) N-butyl, (c) piperidino, or (d) pyrrolidino groups have been examined with sulfite ions and with hydroxide ions in waterDMSO (80:20, v/v). Addit
Publikováno v:
Journal of Physical Organic Chemistry. 19:75-80
Rate measurements are reported for the reactions of 12 ring-substituted anilines with 2,4-dinitrophenyl 2,4,6-trinitrophenyl ether (1) in acetonitrile. Formation of the products, the correspondingly substituted 2,4,6-trinitrodiphenylamines, occurs wi