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185038-21-5

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185038-21-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 185038-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,5,0,3 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 185038-21:
(8*1)+(7*8)+(6*5)+(5*0)+(4*3)+(3*8)+(2*2)+(1*1)=135
135 % 10 = 5
So 185038-21-5 is a valid CAS Registry Number.

185038-21-5Relevant articles and documents

An easy route from catechols to phthalonitriles

Drechsler, Ulf,Hanack, Michael

, p. 1207 - 1208 (1998)

An easy synthetic route from substituted catechols via their corresponding aryl bistriflates to substituted phthalonitriles is described. The displacement of the triflate groups in catechol triflates by cyanide ions proceeded in high yields using zinc cyanide and palladium-1,1′-bis(diphenylphosphino)ferrocene as catalyst. The mild reaction conditions tolerate numerous functional groups and represent a desirable alternative to the generally low-yielding Rosenmund-von Braun reaction.

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