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956219-17-3

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956219-17-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 956219-17-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,6,2,1 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 956219-17:
(8*9)+(7*5)+(6*6)+(5*2)+(4*1)+(3*9)+(2*1)+(1*7)=193
193 % 10 = 3
So 956219-17-3 is a valid CAS Registry Number.

956219-17-3Relevant articles and documents

Facile preparation of 2-iodophenyl trifluoromethanesulfonates: Superior aryne precursors

Ganta, Ashok,Snowden, Timothy S.

, p. 2227 - 2231 (2007)

A comparative study of 3-methoxyaryne precursors revealed 2-iodo-3-methoxyphenyl triflate as the most effective in nonpolar solvent. Use of Hoppe's N-isopropyl carbamate allows for the systematic preparation of a variety of 2-iodophenyl triflates via a directed ortho-lithiation-iodination- decarbamation sequence. These steps are possible without isolation of the intermediate iodophenyl carbamates. Georg Thieme Verlag Stuttgart.

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