@article{CheaNguyenRosencrantz2022, author = {Chea, Sany and Nguyen, Khac Toan and Rosencrantz, Ruben R.}, title = {Microwave-Assisted Synthesis of 5 '-O-methacryloylcytidine Using the Immobilized Lipase Novozym 435}, series = {Molecules}, volume = {27}, journal = {Molecules}, number = {13}, publisher = {MDPI}, address = {Basel}, issn = {1420-3049}, doi = {10.3390/molecules27134112}, pages = {11}, year = {2022}, abstract = {Nucleobase building blocks have been demonstrated to be strong candidates when it comes to DNA/RNA-like materials by benefiting from hydrogen bond interactions as physical properties. Modifying at the 5 ' position is the simplest way to develop nucleobase-based structures by transesterification using the lipase Novozym 435. Herein, we describe the optimization of the lipase-catalyzed synthesis of the monomer 5 '-O-methacryloylcytidine with the assistance of microwave irradiation. Variable reaction parameters, such as enzyme concentration, molar ratio of the substrate, reaction temperature and reaction time, were investigated to find the optimum reaction condition in terms of obtaining the highest yield.}, language = {en} } @article{CheaSchadeReinickeetal.2022, author = {Chea, Sany and Schade, Kristin and Reinicke, Stefan and Bleul, Regina and Rosencrantz, Ruben R.}, title = {Synthesis and self-assembly of cytidine- and guanosine-based copolymers}, series = {Polymer Chemistry}, volume = {13}, journal = {Polymer Chemistry}, number = {35}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1759-9954}, doi = {10.1039/d2py00615d}, pages = {5058 -- 5067}, year = {2022}, abstract = {The base pairing property and the "melting" behavior of oligonucleotides can take advantage to develop new smart thermoresponsive and programmable materials. Complementary cytidine- (C) and guanosine- (G) based monomers were blockcopolymerized using RAFT polymerization technique with poly-(N-(2-hydroxypropyl) methacrylamide) (pHPMA) as the hydrophilic macro chain transfer agent (macro-CTA). C-C, G-G and C-G hydrogen bond interactions of blockcopolymers with respectively C and G moieties have been investigated using SEM, DLS and UV-Vis. Mixing and heating both complementary copolymers resulted in reforming new aggregates. Due to the ribose moiety of the isolated nucleoside-bearing blockcopolymers, the polarity is increased for better solubility. Self-assembly investigations of these bioinspired compounds are the crucial basis for the development of potential future drug delivery systems.}, language = {en} }