117917-94-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117917-94-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,9,1 and 7 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 117917-94:
(8*1)+(7*1)+(6*7)+(5*9)+(4*1)+(3*7)+(2*9)+(1*4)=149
149 % 10 = 9
So 117917-94-9 is a valid CAS Registry Number.
117917-94-9Relevant articles and documents
Asymmetric Hetero Diels-Alder Reactions in Aqueous Solution Using Amino Acid Esters as Chiral Auxiliaries
Waldmann, Herbert
, p. 231 - 238 (2007/10/02)
(R)- and (S)-amino acid methyl ester hydrochlorides form with formaldehyde in THF/water mixtures iminium ions, which react already at 0 deg C as electron-deficient dienophiles in hetero Diels-Alder reactions with cyclopentadiene, cyclohexadiene, and open-