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7 Newest Publications about the topic total organic carbon analysis


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Synthesis of Homogeneous MUC1 Oligomers via a Bi-Directional Ligation Strategy

07-Aug-2013 | Richard James Payne; Dima Al Sheikha; Brendan Wilkinson; Gajan Santhakumar; Morten Thaysen-Andersen, Organic & Biomolecular Chemistry, 2013

The efficient synthesis of homogeneous MUC1 peptide oligomers using sequential ligation reactions in the N-to-C and C-to-N directions is reported. The bi-directional ligation strategy makes use of thioester formation via N→S acyl shift chemistry in combination with peptide ligation reactions and ...


UV Photodissociation of Pyrroles: Symmetry and Substituent Effects

15-Jul-2013 | Tolga N. V. Karsili; Barbara Marchetti; Roberta Moca; Michael N. R. Ashfold, Journal of Physical Chemistry A, 2013

H (Rydberg) atom photofragment translational spectroscopy and ab initio electronic structure calculations are used to explore ways in which ring substituents affect the photofragmentation dynamics of gas phase pyrroles. S1 ← S0 (σ* ← π) excitation in bare pyrrole is electric dipole forbidden but ...


Silyl group migration in a P-silylated phosphonium ylide derived from dppm — A combined experimental and theoretical study

15-Apr-2013 | Author(s): Jens Langer , Villö K. Pálfi , Björn Schowtka , Helmar Görls , Markus Reiher, Inorganic Chemistry Communications, 2013

Publication date: June 2013Source:Inorganic Chemistry Communications, Volume 32 Author(s): Jens Langer , Villö K. Pálfi , Björn Schowtka , Helmar Görls , Markus Reiher The lithium complex [(Et2O)2Li{(Ph2P)2CH}] (2) was synthesized by recrystallization of the corresponding solvent-free ...


Global Analysis of Peptide Cyclization Efficiency

07-Jan-2013 | Amit Thakkar; Thi Ba Trinh; Dehua Pei, Journal of Combinatorial Chemistry, 2013

Cyclic peptides are of considerable interest in drug discovery and nanotechnology. However, macrocyclization of peptides and other compounds has often been perceived as synthetically challenging and the cyclization yields are affected by several factors including the ring size, peptide sequence, ...


Preparation of unnatural N-to-N and C-to-C protein fusions [Chemistry]

24-Jul-2012 | Martin D. Witte; Juan J. Cragnolini; Stephanie K. Dougan; Nicholas C. Yoder; Maximilian W. Popp; Hidde L. Ploegh, Proceedings of the National Academy of Sciences current issue, 2012

Standard genetic approaches allow the production of protein composites by fusion of polypeptides in head-to-tail fashion. Some applications would benefit from constructions that are genetically impossible, such as the site-specific linkage of proteins via their N or C termini, when a remaining ...


RNA editing in plant organelles. Why make it easy?

16-Aug-2011 | B. Castandet, A. Araya, Biochemistry (Moscow), 2011

Gene expression in plant organelles involves a number of distinct co- or posttranscriptional nucleic acid modifications: 5′ and 3′ RNA processing, cis- and trans-splicing, RNA stability, and RNA editing. All contribute to the steady-state RNA levels available for the translation of the reduced ...


A Divergent Mechanistic Course of Pd(0)-Catalyzed Aza-Claisen Rearrangement and Aza-Rautenstrauch-Type Cyclization of N-Allyl Ynamides

09-Apr-2010 | Kyle A. DeKorver; Richard P. Hsung; Andrew G. Lohse; Yu Zhang, Organic Letters, 2010

A fascinating mechanistic study of ynamido−palladium−π-allyl complexes is described that features isolation of a unique silyl ketenimine via aza-Claisen rearrangement, which can be accompanied by an unusual thermal N-to-C 1,3-Ts shift in the formation of tertiary nitriles and a novel ...


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