903523-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 903523-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,3,5,2 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 903523-81:
(8*9)+(7*0)+(6*3)+(5*5)+(4*2)+(3*3)+(2*8)+(1*1)=149
149 % 10 = 9
So 903523-81-9 is a valid CAS Registry Number.
903523-81-9Relevant articles and documents
Mild and nonracemizing conditions for Ullmann-type diaryl ether formation between aryl iodides and tyrosine derivatives
Cai, Qian,He, Gang,Ma, Dawei
, p. 5268 - 5273 (2006)
CuI/N,N-dimethylglycine-catalyzed coupling reaction of L-tyrosine derivatives and L-phenylalanine-derived iodides in the presence of Cs 2CO3 works at 90 °C to provide the corresponding diaryl ether. Partial racemization occurs when N