204327-71-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204327-71-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,3,2 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 204327-71:
(8*2)+(7*0)+(6*4)+(5*3)+(4*2)+(3*7)+(2*7)+(1*1)=99
99 % 10 = 9
So 204327-71-9 is a valid CAS Registry Number.
204327-71-9Relevant articles and documents
Convenient synthesis of cycloalkylphosphonates from (Phenylsulfonyl)methylphosphonate
Kim, Dae Young,Suh, Ki Hyung
, p. 83 - 91 (1998)
Cycloalkylphosphonate derivatives were synthesized in excellent overall yields, in two steps by the bis-alkylation of (phenyl sulfonyl)methylphosphonate with ω-dibromoalkanes in the presence of a phase transfer catalyst followed by desulfonation.
