118534-99-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 118534-99-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,5,3 and 4 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 118534-99:
(8*1)+(7*1)+(6*8)+(5*5)+(4*3)+(3*4)+(2*9)+(1*9)=139
139 % 10 = 9
So 118534-99-9 is a valid CAS Registry Number.
118534-99-9Relevant articles and documents
A PHOSPHORANE MEDIATED SYNTHESIS OF TETRONIC, THIOTETRONIC AND TETRAMIC LACTONES
Brennan, John,Murphy, Patrick J.
, p. 2063 - 2066 (2007/10/02)
Intramolecular reaction of stabilised γ-acylphosphonium ylides derived from esters, thiolesters and amides with γ-lactone carbonyl groups resulted in the formation, by a Wittig-type cyclisation, of tetronic, thiotetronic and tetramic γ-lactones respectively.