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286376-18-9

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286376-18-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 286376-18-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,6,3,7 and 6 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 286376-18:
(8*2)+(7*8)+(6*6)+(5*3)+(4*7)+(3*6)+(2*1)+(1*8)=179
179 % 10 = 9
So 286376-18-9 is a valid CAS Registry Number.

286376-18-9Downstream Products

286376-18-9Relevant articles and documents

Synthesis of aromatic triynes as precursors to helicene derivatives

Stara, Irena G.,Kollarovic, Adrian,Teply, Filip,Stary, Ivo,Saman, David,Fiedler, Pavel

, p. 577 - 609 (2007/10/03)

A general and versatile synthetic approach to a broad series of aromatic triynes as precursors to helicene derivatives has been developed. Employing a set of simple tools, triynes comprising the (phenylethynyl)benzene, 1-(phenylethynyl)naphthalene, and 1-(1-naphthylethynyl)-naphthalene moiety have been prepared in good to excellent yields throughout the whole reaction sequence. The methodology allows constructing various types of a junction between the central diarylacetylene moiety and the attached acetylene units to get the target triynes of general formula R-C≡C-CH2-X-CH2-Ar-C≡C-Ar-CH 2-X-CH2-C≡C-R or R-C≡C-CH2CH2-Ar-C=C-Ar-CH2CH 2-C≡C-R (R = H, CH3, TMS, or TIPS; X = O, NTs, or C(CO2CH3)2; Ar/Ar = 2-phenylene or 2-naphthylene).

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