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108639-47-0

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108639-47-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108639-47-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,6,3 and 9 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 108639-47:
(8*1)+(7*0)+(6*8)+(5*6)+(4*3)+(3*9)+(2*4)+(1*7)=140
140 % 10 = 0
So 108639-47-0 is a valid CAS Registry Number.

108639-47-0Downstream Products

108639-47-0Relevant articles and documents

A 3-hydroxychromone with dramatically improved fluorescence properties

Klymchenko, Andrey S.,Ozturk, Turan,Pivovarenko, Vasyl G.,Demchenko, Alexander P.

, p. 7967 - 7970 (2001)

A new 3-hydroxychromone derivative, 2-(6-diethylaminobenzo[b]furan-2-yl)-3-hydroxychromone, has been synthesized by a concise route. Possessing dual emission common for 3-hydroxyflavones, it exhibits strong red shifts of both absorption and fluorescence spectra, which makes it the longest wavelength fluorescent dye among all known chromones. It also demonstrates a significant increase in fluorescence quantum yield in aprotic solvents and shift in solvent-polarity-dependent switch between normal and tautomer emissive forms. This derivative offers new possibilities in designing novel molecular sensors.

A Novel Synthesis of Benzofuran and Related Compounds. III. The Vilsmeier Reaction of Phenoxyacetaldehyde Diethyl Acetals

Hirota, Takashi,Fujita, Hiroko,Sasaki, Kenji,Namba, Tetsuto

, p. 1715 - 1716 (2007/10/02)

A novel synthesis of 2-benzofurancarbaldehydes by the Vilsmeier reaction of phenoxyacetaldehyde diethyl acetals is described.

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