Approaches to water-soluble phosphines are described which involve conversion of ethylene glycol derivatives and sugar diacetonides into monoallylethers, and hydrophosphorylation of the latter. In the case of the sugars, water-solubility is conferred by a subsequent hydrolysis.
Protecting group free synthesis of glycosyl thiols from reducing sugars in water; application to the production of N-glycan glycoconjugates
作者:S. R. Alexander、D. Lim、Z. Amso、M. A. Brimble、A. J. Fairbanks
DOI:10.1039/c7ob00112f
日期:——
Glycosyl thiols may be accessed from the corresponding reducing sugars in water without recourse to any sugar projecting groups by way of a DMC mediated reaction with thioacetic acid in the presence of base, and hydrolysis of the anomeric thioacetate. Glycosyl thiols produced by this method may be used to access glycoconjugates, such as glycopeptides by use of the thiol–ene click reaction.
Introducing Glycolinkers for the Functionalization of Cytotoxic Drugs and Applications in Antibody-Drug Conjugation Chemistry
作者:Filip S. Ekholm、Henna Pynnönen、Anja Vilkman、Virve Pitkänen、Jari Helin、Juhani Saarinen、Tero Satomaa
DOI:10.1002/cmdc.201600372
日期:2016.11.21
Antibody–drug conjugates (ADCs) are promising alternatives to naked antibodies for selective drug‐delivery applications and treatment of diseases such as cancer. Construction of ADCs relies upon site‐selective, efficient and mild conjugation technologies. The choice of a chemical linker is especially important, as it affects the overall properties of the ADC. We envisioned that hydrophilic bifunctional
Synthesis of Novel Di- and Trisaccharide Mimetics with Non-Glycosidic Amino Bridges
作者:Janna Neumann、Saskia Weingarten、Joachim Thiem
DOI:10.1002/ejoc.200600958
日期:2007.3
Synthesis of novel di- and trisaccharides using enzymatic glycosylation, Dess–Martin oxidation and reductive amination allows rapid access to the target structures. Thus, a novel class of glycomimetics was obtained having nitrogen inserted as bridging atom between two non-anomeric positions. Novel di- and trisaccharide mimetics were designed using N-acetylglucosamine as a basis structure. A third monosaccharide
A facile new procedure for the deprotection of allyl ethers under mild conditions
作者:Yun-Jin Hu、Romyr Dominique、Sanjoy Kumar Das、René Roy
DOI:10.1139/v00-073
日期:2000.6.1
instead of cross-metathesis during an olefin metathesis reaction using Grubbs' ruthenium benzylidene catalyst (Cy3P)2RuCl2=CHPh (1), N-allyltritylamine, and N,N-diisopropylethylamine as necessary auxiliary reagents. In the search for a better catalytic system, it has been found that dichlorotris(triphenylphosphine)ruthenium(II), [(C6H5)3P]3RuCl2, (2) was much more efficient for the isomerization of allylic