75160-24-6Relevant articles and documents
A hydrogen-bond flip-flop through a bjerrum-type defect
Olschewski, Martin,Lindner, J?rg,V?hringer, Peter
, p. 2602 - 2605 (2013)
Back and forth: Femtosecond two-dimensional infrared exchange spectroscopy was used to study the dynamics of the reversal of an intramolecular hydrogen bond. The H-bond reversal resembles a flip-flop motion that is facilitated by two concerted disrotatory torsional isomerizations and that occurs on a time scale of about 2 ps. Copyright
Solid-phase synthesis for novel nerve agent adducted nonapeptides as biomarkers
Li, Xinhai,Yuan, Ling,Wang, Qinggang,Liang, Longhui,Huang, Guilan,Li, Xiaosen,Zhang, Chunhong,Liu, Shilei,Liu, Jingquan
, p. 1437 - 1440 (2017/03/23)
An efficient synthesis of d5-VX adducted nonapeptide and d15-GD adducted nonapeptide via solid-phase approach has been developed. The deuterated peptides could be used as the isotope-labeled internal standard for LC-MS/MS detecting the BuChE-OPNA biomarkers. This method also offers an access to the synthesis and detection of other phosphorylated nonapeptides.
Solvent-dependent changes in the triazolinedione-alkene ene reaction mechanism
Vougioukalakis, Georgios C.,Roubelakis, Manolis M.,Alberti, Mariza N.,Orfanopoulos, Michael
experimental part, p. 9697 - 9705 (2009/10/17)
The influence of the solvent on the triazolinedione-alkene ene reaction mechanism has been investigated. Both inter- and intramolecular kinetic isotope effects with tetramethylethylenes and 2,2,2-(trideuterio)methyl-7-methyl-2,6- octadiene-[D3]-1,1,1 provide, for the first time, strong evidence for changes in the mechanism of the reaction on going from non-protic to polar protic solvents. In non-protic polar or apolar solvents, an aziridinium imide that equilibrates to an insignificant extent with an open intermediate (a dipolar or a polarized biradical) is formed irreversibly in the first, rate-determining step of the reaction, which is followed by fast hydrogen abstraction. On the contrary, in polar protic solvents, hydrogen abstraction is rate limiting, allowing the main dipolar intermediate to equilibrate with its open intermediate(s) as well as with the starting reagents.