112275-50-0Relevant articles and documents
Micelles for delivery of nitric oxide
Jo, Yun Suk,Van Der Vlies, Andrej,Gantz, Jay,Thacher, Tyler N.,Antonijevic, Sasa,Cavadini, Simone,Demurtas, Davide,Stergiopulos, Nikolaos,Hubbell, Jeffrey A.
, p. 14413 - 14418 (2009)
We designed block copolymer pro-amphiphiles and amphiphiles for providing very long-term release of nitric oxide (NO). A block copolymer of N-acryloylmorpholine (AM, as a hydrophile) and N-acryloyl-2,5-dimethylpiperazine (AZd, as a hydrophilic precursor) was synthesized. The poly(N-acryloyl-2,5- dimethylpiperazine) (PAZd) is water-soluble, but chemical reaction of the secondary amines with NO to form a N-diazeniumdiolate (NONOate) converts the hydrophilic PAZd into a hydrophobic poly(sodium-1-(N-acryloyl-2,5- dimethylpiperazin-1-yl)diazen-1-ium-1,2-diolate) (PAZd·NONOate), driving aggregation. The PAM block guides this process toward micellization, rather than precipitation, yielding ca. 50 nm spherical micelles. The hydrophobic core of the micelle shielded the NONOate from the presence of water, and thus protons, which are required for NO liberation, delaying release to a remarkable 7 d half-life. Release of the NO returned the original soluble polymer. The very small NO-loaded micelles were able to penetrate complex tissue structures, such as the arterial media, opening up a number of tissue targets to NO-based therapy.
Optimization of 5-substituted thiazolyl ureas and 6-substituted imidazopyridines as potential HIV-1 latency reversing agents
Blackmore, Timothy R.,Jacobson, Jonathan,Jarman, Kate E.,Lewin, Sharon R.,Nguyen, William,Purcell, Damian F.,Sabroux, Helene Jousset,Sleebs, Brad E.
, (2020/04/08)
A persistent latent reservoir of virus in CD4+ T cells is a major barrier to cure HIV. Activating viral transcription in latently infected cells using small molecules is one strategy being explored to eliminate latency. We previously described the use of a FlpIn.FM HEK293 cellular assay to identify and then optimize the 2-acylaminothiazole class to exhibit modest activation of HIV gene expression. Here, we implement two strategies to further improve the activation of viral gene expression and physicochemical properties of this class. Firstly, we explored rigidification of the central oxy-carbon linker with a variety of saturated heterocycles, and secondly, investigated bioisosteric replacement of the 2-acylaminothiazole moiety. The optimization process afforded lead compounds (74 and 91) from the 2-piperazinyl thiazolyl urea and the imidazopyridine class. The lead compounds from each class demonstrate potent activation of HIV gene expression in the FlpIn.FM HEK293 cellular assay (both with LTR EC50s of 80 nM) and in the Jurkat Latency 10.6 cell model (LTR EC50 220 and 320 nM respectively), but consequently activate gene expression non-specifically in the FlpIn.FM HEK293 cellular assay (CMV EC50 70 and 270 nM respectively) manifesting in cellular cytotoxicity. The lead compounds have potential for further development as novel latency reversing agents.
Diamines compound single-Boc protection method
-
Paragraph 0020; 0044; 0046, (2017/08/31)
The invention relates to a diamines compound single-Boc protection method. The method includes following steps: enabling t-butylazidoformate and the diamines compound to react in an organic solvent at 0-30 DEG C to obtain a single-Boc-protected diamines compound. T-butylazidoformate is used as a Boc protection reagent, so that reaction selectivity can be improved effectively; a byproduct is nitrogen which escapes directly from a reaction system. By the method, the defect that a byproduct-isobutene is generated when Boc anhydride is taken as a raw material is overcome, and the problems of thick reaction system and difficulty in purification are solved thoroughly. The method is high in reaction efficiency, simple in aftertreatment and suitable for industrial production.
