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196090-14-9

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196090-14-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 196090-14-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,6,0,9 and 0 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 196090-14:
(8*1)+(7*9)+(6*6)+(5*0)+(4*9)+(3*0)+(2*1)+(1*4)=149
149 % 10 = 9
So 196090-14-9 is a valid CAS Registry Number.

196090-14-9Downstream Products

196090-14-9Relevant articles and documents

Preparation of chiral 1,2,4-triazolium salts as new NHC precatalysts

Strand, Ragnhild B.,Solvang, Tina,Sperger, Christian A.,Fiksdahl, Anne

experimental part, p. 838 - 842 (2012/09/22)

The preparation of new chiral N,N′-disubstituted 1,2,4-triazolium based NHC salt precursors, Ia′ and Ib, from phenylhydrazine and l-phenylalanine is reported. The 1,3,4-trisubstituted triazolium salt Ia′ was obtained by a stepwise ring construction from l-phenylalanine via the corresponding imino ether and acetohydrazonamide, while a heterocyclic O-/N-heteroatom exchange strategy, based on a ring-opening/ring-closure of the oxadiazolium precursor, afforded the 1,4-disubstituted 1,2,4-triazolium salt Ib. The need for two different synthetic strategies is discussed.

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