Continuous-flow processes for the S-alkynylation of cysteine-containing peptides and thioglycosides under catalyst-free, oxidant-free and mild conditions
selective alkylation of cysteine-containing peptides in a continuousflow reactor has been developed, providing an efficient pathway to alkylated cysteine-containing peptidesunder mild conditions. This process does not need light, metal catalysts, or oxidative reagents. It provides a useful method for the modification of amino acids and peptides. As one of the low cost and synthetic versatile raw materials
<sup>18</sup>F-Trifluoromethylation of Unmodified Peptides with 5-<sup>18</sup>F-(Trifluoromethyl)dibenzothiophenium Trifluoromethanesulfonate
作者:Stefan Verhoog、Choon Wee Kee、Yanlan Wang、Tanatorn Khotavivattana、Thomas C. Wilson、Veerle Kersemans、Sean Smart、Matthew Tredwell、Benjamin G. Davis、Véronique Gouverneur
DOI:10.1021/jacs.7b10227
日期:2018.2.7
18F-labeling of 5-(trifluoromethyl)-dibenzothiophenium trifluoromethanesulfonate, commonly referred to as the Umemoto reagent, has been accomplished applying a halogen exchange 18F-fluorination with 18F-fluoride, followed by oxidative cyclization with Oxone and trifluoromethanesulfonic anhydride. This new 18F-reagent allows for the direct chemoselective 18F-labeling of unmodified peptides at the thiol cysteine
Continuous-flow processes for the <i>S</i>-alkynylation of cysteine-containing peptides and thioglycosides under catalyst-free, oxidant-free and mild conditions