1309929-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1309929-20-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,9,9,2 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1309929-20:
(9*1)+(8*3)+(7*0)+(6*9)+(5*9)+(4*2)+(3*9)+(2*2)+(1*0)=171
171 % 10 = 1
So 1309929-20-1 is a valid CAS Registry Number.
1309929-20-1Relevant articles and documents
1,4-Addition of tetraethyl fluoromethylenebisphosphonate to α,β-unsaturated compounds
Opekar, Stanislav,Beier, Petr
experimental part, p. 363 - 366 (2011/06/20)
Tetraethyl fluoromethylenebisphosphonate in the presence of cesium carbonate in DMF undergoes efficient 1,4-addition to Michael acceptors having terminal double bond such as α,β-unsaturated ketones, esters, sulfones, sulfoxides, and phosphonates to yield
