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121501-63-1

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121501-63-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121501-63-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,5,0 and 1 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121501-63:
(8*1)+(7*2)+(6*1)+(5*5)+(4*0)+(3*1)+(2*6)+(1*3)=71
71 % 10 = 1
So 121501-63-1 is a valid CAS Registry Number.

121501-63-1Downstream Products

121501-63-1Relevant articles and documents

Reactivity-based detection of copper(II) ion in water: Oxidative cyclization of azoaromatics as fluorescence turn-on signaling mechanism

Jo, Junyong,Lee, Ho Yong,Liu, Wenjun,Olasz, Andras,Chen, Chun-Hsing,Lee, Dongwhan

, p. 16000 - 16007 (2012/10/30)

An oxidative cyclization reaction transforms nonemissive azoanilines into highly fluorescent benzotriazoles. We have found that introduction of multiple electron-donating amino groups onto a simple o-(phenylazo)aniline platform dramatically accelerates its conversion to the emissive polycyclic product. Notably, this chemistry can be effected by μM-level concentrations of copper(II) ion in water (pH = 6-8) at room temperature to elicit >80-fold enhancement in the green emission at λem = 530 nm. Comparative kinetic and electrochemical studies on a series of structural analogues have established that the accelerated reaction rates correlate directly with a systematic cathodic shift in the oxidation onset potential of the azo precursors. In addition, single-crystal X-ray crystallographic analysis on the most reactive derivative revealed the presence of a five-membered ring intramolecular hydrogen-bonding network. An enhanced contribution of the quinoid-type resonance in such conformation apparently facilitates the mechanistically required proton transfer step, which, in conjunction with electron transfer at lower oxidation potential, contributes to a rapid cyclization reaction triggered by copper(II) ion in water.

TREATMENT OF DUCHENNE MUSCULAR DYSTROPHY

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Page/Page column 29-30, (2010/11/28)

There are disclosed compound of Formula (I) or (II) wherein A1, A2, A3, A4and A5, which may be the same or different, represent N or CR1, R9 represents - L -R3, in whi

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