129192-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129192-21-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,1,9 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 129192-21:
(8*1)+(7*2)+(6*9)+(5*1)+(4*9)+(3*2)+(2*2)+(1*1)=128
128 % 10 = 8
So 129192-21-8 is a valid CAS Registry Number.
129192-21-8Relevant articles and documents
Stereoselective synthesis of substituted tetrahydrofurans using 5-Endo- trig cyclisation reactions
Craig, Donald,Ikin, Neil J.,Mathews, Neil,Smith, Alison M.
, p. 13471 - 13494 (1999)
Sulfonyl-substituted homoallylic alcohols undergo 5-endo-trig cyclisation reactions on treatment with base, with cyclisation stereoselectivity depending on double bond geometry.