Garlic-inspired trisulfide linkers for thiol-stimulated H<sub>2</sub>S release
作者:Francesca Ercole、Michael R. Whittaker、Michelle L. Halls、Ben J. Boyd、Thomas P. Davis、John F. Quinn
DOI:10.1039/c7cc03820h
日期:——
Garlic-derived polysulfides (e.g., diallyl trisulfide, DATS) act as potent donors of the cell-signalling mediator H2S when exposed to endogenous thiols. Inspired by this chemistry, we incorporated a trisulfide linkage into a conjugate comprising an mPEG tail and a cholesteryl head via thiol-mediated fragmentation chemistry. The synthesized conjugate releases H2S upon exposure to thiol even at intracellular
作者:Francesca Ercole、Yuhuan Li、Michael R. Whittaker、Thomas P. Davis、John F. Quinn
DOI:10.1039/c9tb02614b
日期:——
by the properties of the naturally occurring H2S donor, diallyl trisulfide (DATS, extracted from garlic), the biological behaviour of trisulfide-bearing PEG-conjugates was explored. Specifically, three conjugates comprising an mPEG tail and a cholesteryl head were investigated: conjugates bridged by a trisulfide linker (T), a disulfide linker (D) or a carbamate linker (C), and a fourth comprising two
Synthesis and Pharmacology of Novel Analogues of Oxytocin and Deaminooxytocin: Directed Methods for the Construction of Disulfide and Trisulfide Bridges in Peptides<sup>,</sup><sup>,</sup>
Using as models the neurohypophyseal nonapeptide hormone oxytocin and itsanalogue deaminooxytocin, several directed routes to formation of sulfur-sulfur bridges have been developed and evaluated. The linear sequences (through common octapeptide-resin intermediates) were assembled smoothly on tris(alkoxy)benzylamide (PAL) poly(ethylene glycol)-polystyrene (PEG-PS) graft supports, using stepwise Fmoc
Scaled-up Synthesis and Characterization of Oxytocin Trisulfide
作者:Robert P. Hammer、Melissa A. Butrie、Karen Davidson、Phillip T. Goldblatt、Alex M. Schrader、Joseph J. Dalluge、Allyn Becker、George Barany
DOI:10.1007/s10989-023-10580-9
日期:——
trisulfide (3), was required on a multi-100 mg scale, as part of an analytical method validation process for the clinically and commercially important product “Oxytocin Injection,” which is a sterile isotonic injectable formulation of oxytocin (2). We report here that previous chemistry from our academic laboratory can be successfully scaled up in the biotechnology sector to indeed provide pure 3 (overall
Experimental and theoretical studies on bis(chlorocarbonyl)trisulfane, ClC(O)SSSC(O)Cl
作者:Yeny A. Tobón、Melina V. Cozzarín、Carlos O. Della Védova、Rosana M. Romano
DOI:10.1016/j.molstruc.2009.04.025
日期:2009.7
Bis(chlorocarbonyl)trisulfane, ClC(O)SSSC(O)Cl, was prepared by the reaction of (CH3)(2)CHOC(S)SC-(S)OCH(CH3)(2) and SO2Cl2 at 65 degrees C. The compound was characterized and identified by vibrational spectroscopy, GC-MS, matrix isolation and photochemical studies as well as by quantum chemical calculations. Matrix photochemical studies and vibrational spectra were interpreted in terms of the presence of three forms with syn-gauche-gauche-syn (I), syn-(-)gauche-gauche-syn (II), and syn-gauche-gauche-anti (III) conformations. The syn and anti conformations correspond to the orientation of each C=O group with respect to the adjacent S-S bond, while the gauche form refers to the conformation around each of the S-S bond. This result is in agreement with quantum chemical calculations which predict structures II and III to be higher in energy than conformer I by about 1.51/0.98 and 2.52/2.84 kcal/mol for the B3LYP/MP2 approximations in combination with the 6-31+G* basis set. An assignment of the liquid IR and Raman spectra is proposed for ClC(O)SSSC(O)Cl, as well as the possible mechanisms of the photolysis in Ar and N-2 matrices. The presence of ClC(O)SSCl as a photochemical product opens the possibility of further investigations for this family. (C) 2009 Elsevier B.V. All rights reserved.