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NOBS is the main bleach activator used in the U.S.A. and Japan. [4] Compared to TAED , which is the predominant bleach activator used in Europe, NOBS is efficient at much lower temperatures. At 20 °C NOBS is 100 times more soluble than TAED in water. [ 5 ]
N,N′-Dicyclohexylcarbodiimide (DCC or DCCD) [1] is an organic compound with the chemical formula (C 6 H 11 N) 2 C. It is a waxy white solid with a sweet odor. Its primary use is to couple amino acids during artificial peptide synthesis. The low melting point of this material allows it to be melted for easy handling.
On the category of oxidative addition, M. L. H. Green in 1970 reported on the photochemical insertion of tungsten (as a Cp 2 WH 2 complex) in a benzene C–H bond [7] and George M. Whitesides in 1979 was the first to carry out an intramolecular aliphatic C–H activation [8] Fujiwara's palladium- and copper-catalyzed C-H functionalization
For radiolabeling, the pH of the 68 Ga containing generator eluate has to be raised from its initial value (depending on HCl concentration, pH 1–1.5) to pH 2–3.5 [11] using suitable buffers, such as sodium acetate.
[1] [2] As a liquid, it is easier to handle than the commonly used N,N ′-dicyclohexylcarbodiimide, a waxy solid. In addition, N , N ′ -diisopropylurea, its byproduct in many chemical reactions, is soluble in most organic solvents , a property that facilitates work-up .
As such, CDC are couplings belonging to the C-H activation strategy. Cross-dehydrogenative-coupling between two C-H bonds. The key to the CDC coupling is eliminating the need for substrate prefunctionalization. Therefore, the CDC reaction has the advantages of high efficiency, Atom economy and environmental friendliness.
Cholinesterase reactivators are drugs that reverse the inhibition of cholinesterase by organophosphates or sulfonates. [1] They are used as antidote for treating organophosphate insecticide and nerve agent poisoning. [ 2 ]
In phosphors and scintillators, the activator is the element added as dopant to the crystal of the material to create desired type of nonhomogeneities. In luminescence , only a small fraction of atoms, called emission centers or luminescence centers , emit light.