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https://hdl.handle.net/2440/4517
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DC Field | Value | Language |
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dc.contributor.author | Bowie, J. | - |
dc.contributor.author | Wabnitz, P. | - |
dc.contributor.author | Waugh, R. | - |
dc.contributor.author | Eckersley, M. | - |
dc.contributor.author | Dua, S. | - |
dc.contributor.author | Blumenthal, T. | - |
dc.date.issued | 1996 | - |
dc.identifier.citation | International journal of mass spectrometry and ion processes, 1996; 154(3):193-201 | - |
dc.identifier.issn | 0168-1176 | - |
dc.identifier.uri | http://hdl.handle.net/2440/4517 | - |
dc.description.abstract | Deprotonation of 2,5-diketopiperazine (with HO-) can occur either on N (position 1(4)) or on carbon (position 3(6)). The two depotonated forms are interconvertible on collisional activation. The major collision-induced fragmentations of (M - H)- ions of substituted 2,5-diketopiperazines are (i) characteristic side-chain losses (e.g. Me. for Ala, PhCH2. for Phe, and O = C6H4 = CH2 for Tyr), which identify the particular 2,5-diketopiperazine, and (ii) an unusual loss of RCHO (R is the substituent, e.g. Me for Ala), which involves initial 1,2 migration of R. to the carbon of the adjacent carbonyl group. © 1996 Elsevier Science B.V. All rights reserved. | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.source.uri | http://dx.doi.org/10.1016/0168-1176(96)04378-9 | - |
dc.title | The negative ion mass spectra of deprotonated 2,5-diketopiperazines | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/0168-1176(96)04378-9 | - |
pubs.publication-status | Published | - |
Appears in Collections: | Aurora harvest 2 Chemistry publications |
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