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108656-91-3

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108656-91-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108656-91-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,6,5 and 6 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 108656-91:
(8*1)+(7*0)+(6*8)+(5*6)+(4*5)+(3*6)+(2*9)+(1*1)=143
143 % 10 = 3
So 108656-91-3 is a valid CAS Registry Number.

108656-91-3Downstream Products

108656-91-3Relevant articles and documents

Waste-minimised copper-catalysed azide-alkyne cycloaddition in Polarclean as a reusable and safe reaction medium

Luciani, Lorenzo,Goff, Emily,Lanari, Daniela,Santoro, Stefano,Vaccaro, Luigi

, p. 183 - 187 (2018)

Herein we report the first example of a generally useful organic reaction, namely the copper-catalysed azide-alkyne cycloaddition, performed in a Polarclean/water mixture as a reaction medium. The process is very efficient, affording in 24 out of the 26 tested cases the desired triazole in quantitative yields. Product isolation is also very convenient, since the triazoles either precipitate or form a separate liquid phase, without the need to perform chromatographic separations. Moreover, since the metal catalyst is retained in the Polarclean/water phase, the catalyst/reaction medium can be easily reused for consecutive reaction runs, without an apparent loss in efficiency. This methodology is associated with very limited waste production, as evidenced by calculated E-factors in the range 2.6-3.7.

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