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671779-18-3

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671779-18-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 671779-18-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,7,1,7,7 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 671779-18:
(8*6)+(7*7)+(6*1)+(5*7)+(4*7)+(3*9)+(2*1)+(1*8)=203
203 % 10 = 3
So 671779-18-3 is a valid CAS Registry Number.

671779-18-3Relevant articles and documents

Optimised microwave-assisted synthesis of methylcarbonate salts: A convenient methodology to prepare intermediates for ionic liquid libraries

Holbrey, John D.,Rogers, Robin D.,Shukla, Saloni S.,Wilfred, Cecilia D.

, p. 407 - 413 (2010)

The reaction of 1-butylpyrrolidine with dimethyl carbonate to yield the ionic liquid precursor, 1-butyl-1-methylpyrrolidinium methylcarbonate, has been investigated under microwave heating conditions and the reaction parameters optimised to achieve 100% yield of the pyrrolidinium salt with no by-products in under 1 h. The reactions of tributylamine, trioctylphosphine, and 1-butylimidazole with dimethyl carbonate under comparable conditions have also been evaluated, yielding the corresponding methylcarbonate salts which can be used as intermediates for the preparation of halide-free ionic liquids without generating any undesirable salt wastes.

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