131188-97-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 131188-97-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,1,8 and 8 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 131188-97:
(8*1)+(7*3)+(6*1)+(5*1)+(4*8)+(3*8)+(2*9)+(1*7)=121
121 % 10 = 1
So 131188-97-1 is a valid CAS Registry Number.
131188-97-1Relevant articles and documents
A Directed Metalation Approach to 2-Trialkylammoniomethyl-3-(trimethylsilylmethyl)-thiophene Iodides: Precursors to 2,3-Bis(methylene)-2,3-dihydrothiophene
Plant, Andrew,Chadwick, Derek J.
, p. 915 - 917 (2007/10/02)
Syntheses of precursors to 2,3-bis(methylene)-2,3-dihydrothiophene (2) are described.As key step, a lithiation reaction using secondary carboxamido functionality as directing group is used.
