40635-66-3Relevant articles and documents
Synthesis of degradable and chemically recyclable polymers using 4,4-disubstituted five-membered cyclic ketene hemiacetal ester (CKHE) monomers
Ge, Yicen,Goto, Atsushi,Oh, Xin Yi
, p. 13546 - 13556 (2021/10/29)
Novel degradable and chemically recyclable polymers were synthesized using five-membered cyclic ketene hemiacetal ester (CKHE) monomers. The studied monomers were 4,4-dimethyl-2-methylene-1,3-dioxolan-5-one (DMDL) and 5-methyl-2-methylene-5-phenyl-1,3-dioxolan-4-one (PhDL). The two monomers were synthesized in high yields (80-90%), which is an attractive feature. DMDL afforded its homopolymer with a relatively high molecular weight (Mn>100?000, whereMnis the number-average molecular weight). DMDL and PhDL were copolymerized with various families of vinyl monomers,i.e., methacrylates, acrylates, styrene, acrylonitrile, vinyl pyrrolidinone, and acrylamide, and various functional methacrylates and acrylate. Such a wide scope of the accessible polymers is highly useful for material design. The obtained homopolymers and random copolymers of DMDL degraded in basic conditions (in the presence of a hydroxide or an amine) at relatively mild temperatures (room temperature to 65 °C). The degradation of the DMDL homopolymer generated 2-hydroxyisobutyric acid (HIBA). The generated HIBA was recovered and used as an ingredient to re-synthesize DMDL monomer, and this monomer was further used to re-synthesize the DMDL polymer, demonstrating the chemical recycling of the DMDL polymer. Such degradability and chemical recyclability of the DMDL polymer may contribute to the circular materials economy.
Second generation of fucose-based DC-SIGN ligands: Affinity improvement and specificity versus Langerin
Andreini, Manuel,Doknic, Daniela,Sutkeviciute, Ieva,Reina, Jose J.,Duan, Janxin,Chabrol, Eric,Thepaut, Michel,Moroni, Elisabetta,Doro, Fabio,Belvisi, Laura,Weiser, Joerg,Rojo, Javier,Fieschi, Franck,Bernardi, Anna
supporting information; experimental part, p. 5778 - 5786 (2011/10/02)
DC-SIGN and Langerin are two C-type lectins involved in the initial steps of HIV infections: the former acts as a viral attachment factor and facilitates viral invasion of the immune system, the latter has a protective effect. Potential antiviral compounds targeted against DC-SIGN were synthesized using a common fucosylamide anchor. Their DC-SIGN affinity was tested by SPR and found to be similar to that of the natural ligand Lewis-X (LeX). The compounds were also found to be selective for DC-SIGN and to interact only weakly with Langerin. These molecules are potentially useful therapeutic tools against sexually transmitted HIV infection.
Nucleotides: Part LIX: Synthesis, characterization, and biological activities of new potential antiviral agents: (2'-5')Adenylate trimer analogs containing 3'-deoxy-3'(hexadecanoylamino)adenosine at the 2'-terminus
Schirmeister-Tichy, Helga,Iacono, Kathryn T.,Muto, Nicholas F.,Homan, Joseph W.,Suhadolnik, Robert J.,Pfleiderer, Wolfgang
, p. 597 - 613 (2007/10/03)
Based upon 3'-amino-3'-deoxyadenosine (15), its protected 3'- hexadecanoylamino derivative 22 was chosen as starting material for the synthesis of a series of new modified 2'-5'-adenylate trimers 33-36 as potential antiviral agents. All (2'-5')A trimer analogs 33-36 inhibit HIV-1 replication as measured by the inhibition of syncytia formation and inhibition of HIV-1 reverse transcriptase activity. Compound 34 inhibits HIV- 1 reverse transcription by 100% and subsequently inhibits expression of HIV- 1 p24. However, compound 35 acts differently, since it does not inhibit HIV- 1 reverse transcription, HIV-1 integrase, or HIV-1 p24 expression. Therefore, 35 appears to exert its inhibitory effect at a later stage of HIV-1 replication, i.e., the budding process.
