Dechalcogenative Allylic Selenosulfide and Disulfide Rearrangements: Complementary Methods for the Formation of Allylic Sulfides in the Absence of Electrophiles. Scope, Limitations, and Application to the Functionalization of Unprotected Peptides in Aqueous Media
作者:David Crich、Venkataramanan Krishnamurthy、Franck Brebion、Maheswaran Karatholuvhu、Venkataraman Subramanian、Thomas K. Hutton
DOI:10.1021/ja072969u
日期:2007.8.1
Primary allylic selenosulfates (seleno Bunte salts) and selenocyanates transfer the allylic selenide moiety to thiols giving primary allylic selenosulfides, which undergo rearrangement in the presence of PPh3 with the loss of selenium to give allylically rearranged allyl alkylsulfides. This rearrangement may be conducted with prenyl-type selenosulfides to give isoprenyl alkylsulfides. Alkyl secondary
The thiol-based reduction of Bi(V) and Sb(V) anti-leishmanial complexes
作者:Rebekah N. Duffin、Liam J. Stephens、Victoria L. Blair、Lukasz Kedzierski、Philip C. Andrews
DOI:10.1016/j.jinorgbio.2021.111470
日期:2021.8
higher pH (6–7), the complexes behave quite differently towards glutathione. The Bi(V) complex is again reduced rapidly but the Sb(V) complex undergoes slow reduction over 8 h (t1/2 = 54 min.) These results give the first insights into why the highly oxidising Bi(V) complexes display low selectivity in their cytotoxicity towards leishmanial and mammalian cells, while the Sb(V) complexes show good selectivity
Exploring the Formation Pathways of Donor−Acceptor Catenanes in Aqueous Dynamic Combinatorial Libraries
作者:Fabien B. L. Cougnon、Ho Yu Au-Yeung、G. Dan Pantoş、Jeremy K. M. Sanders
DOI:10.1021/ja111407m
日期:2011.3.9
The discovery through dynamic combinatorial chemistry (DCC) of a new generation of donor-acceptor [2]catenanes highlights the power of DCC to access unprecedented structures. While conventional thinking has limited the scope of donor-acceptor catenanes to strictly alternating stacks of donor (D) and acceptor (A) aromatic units, DCC is demonstrated in this paper to give access to unusual DAAD, DADD
Chain-like assembly of gold nanoparticles on artificial DNA templates via ‘click chemistry’
作者:Monika Fischler、Alla Sologubenko、Joachim Mayer、Guido Clever、Glenn Burley、Johannes Gierlich、Thomas Carell、Ulrich Simon
DOI:10.1039/b715602b
日期:——
We present a new type of azide-functionalized gold nanoparticle and their coupling to an alkyne-modified DNA duplex using the copper(I)-catalyzed Huisgen cycloaddition (âclick chemistryâ), resulting in a chain-like assembly of nanoparticles on the DNA template.
Chemoselective Protection of Glutathione in the Preparation of Bioconjugates: The Case of Trypanothione Disulfide
作者:Antonia I. Antoniou、Dionissia A. Pepe、Donatella Aiello、Carlo Siciliano、Constantinos M. Athanassopoulos
DOI:10.1021/acs.joc.6b00300
日期:2016.5.20
involving the chemical modification of the commercially available glutathione (GSH). The synthetic value of this building block in the facile preparation of GSH bioconjugates in a satisfying overall yield was exemplified by the case of trypanothione disulfide (TS2), a GSH-spermidine bioconjugate, involved in the antioxidative stress protection system of parasitic protozoa, such as trypanosoma and leishmania