ORGN 97 |
| Based on pulsed laser excitations and nanosecond kinetic spectrometry, a time-resolved study has been performed on ring opening in phenyl aziridines in solutions under various conditions of photoexcitation, namely, direct excitation (lex = 266 nm), triplet energy transfer from acetone (lex = 308 nm) and reversible electron transfer sensitization by 1,4-dicyanonaphthalene singlet ((lex = 337 nm). In all cases, the ring-opened azomethine ylides have been observed and characterized as transient species in solutions at room temperature. This paper will focus on the kinetic data concerning transient behavior and reactivity of azomethine ylides and will compare photochemical ring opening characteristics of phenyl aziridines with those of phenyl oxiranes. |
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Process R&D, Physical Organic Chemistry, Heterocycles, Aromatics, Metal-Mediated Reactions
8:00 PM-10:00 PM, Sunday, March 25, 2007 Hyatt Regency Chicago -- Riverside Center, Poster
Division of Organic Chemistry |