2623-87-2Relevant articles and documents
Synthesis and Properties of Novel Surface Active Monomers Based on Derivatives of 4-Hydroxybutyric Acid and 6-Hydroxyhexanoic Acid
Borzenkov, Mykola,Mitina, Natalia,Lobaz, Volodymyr,Hevus, Orest
, p. 133 - 144 (2015)
Novel surface active maleate and methacrylate monomers based on derivatives of ω-hydroxy carboxylic acids have been synthesized. The monomers are comprised of hydrophobic alkyl chains and hydrophilic poly(ethylene glycol), quaternary ammonium, sulfonate and carboxylic fragments. Synthesized monomers sufficiently reduce surface tension at the aqueous solution-air interface. The copolymerization of synthesized monomers with 5-tert-butylperoxy-5-methyl-2-hexene-3-yne monomer and N-vinylpyrrolidone in solvent and emulsion copolymerization of synthesized peroxide containing surface active monomer with styrene have been carried out. The synthesized surface active monomers have been shown to be suitable emulsifiers for obtaining polystyrene colloid dispersions. It has been ascertained that the surface active copolymers obtained can form stable interpolyelectrolyte complexes with oppositely charged polymers.
Boron tribromide as a reagent for anti-Markovnikov addition of HBr to cyclopropanes
Chen, Shuming,Gieuw, Matthew H.,Houk, K. N.,Ke, Zhihai,Yeung, Ying-Yeung
, p. 9426 - 9433 (2020/10/02)
Although radical formation from a trialkylborane is well documented, the analogous reaction mode is unknown for trihaloboranes. We have discovered the generation of bromine radicals from boron tribromide and simple proton sources, such as water ortert-butanol, under open-flask conditions. Cyclopropanes bearing a variety of substituents were hydro- and deuterio-brominated to furnish anti-Markovnikov products in a highly regioselective fashion. NMR mechanistic studies and DFT calculations point to a radical pathway instead of the conventional ionic mechanism expected for BBr3
Building blocks for (C15-C3)-modified epothilone D analogs
Valeev,Bikzhanov,Miftakhov
, p. 1511 - 1519 (2015/02/02)
A promising potentially biologically active structure have been designed by isosteric rearrangement of the C15-C3 fragment of epothilone D, and building blocks necessary for its assembly have been synthesized.