Reagents

e-protein

Atmospheric Pressure Plasma Jet Treatment of Polymers Enables Reagent

The Bestmann-Ohira Reagent and Related Diazo Compounds for the Synthesis of Azaheterocycles

 

Azaheterocycles are one of essentially the most prevalent lessons of compounds current in quite a few bioactive compounds, pure merchandise, and agrochemicals, and undoubtedly, new strategies to entry them are at all times in excessive demand. Among the strategies accessible, the 1,3-dipolar cycloaddition reactions involving diazo compounds are significantly engaging as a result of of their skill to quickly assemble densely functionalized azaheterocycles in a regioselective method.

In this context, the Bestmann-Ohira reagent has grow to be a well known reagent for the 1,3-dipolar cycloaddition reactions to supply phosphonylated heterocycles, moreover its widespread use as a homologating agent for the conversion of aldehydes to alkynes. read more

e-protein

A Difluoroalkylation Reagent for Organocatalytic Vinylogous Nitroaldol

A spot check for willpower of residual TBA ranges in  F-radiotracers for human use utilizing Dragendorff reagent

 

When using [18F]tetrabutylammonium fluoride ([18F]TBAF) within the synthesis of 18F-labeled radiotracers for scientific positron emission tomography (PET) imaging, it’s essential to substantiate that residual TBA ranges in formulated doses don’t exceed established specs (≤2.6 mg per affected person dose).

Historically this has been completed utilizing HPLC, however that is time consuming for short-lived PET radiotracers and restricted by the necessity for costly gear. This motivated us to introduce a TLC spot check for figuring out residual TBA, and we’ve got developed a brand new methodology which employs the Dragendorff reagent. Herein we report particulars of the TLC methodology and use it to quantify residual TBA in several formulations of 6-[18F]fluoro-DOPA. read more