129840-87-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129840-87-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,8,4 and 0 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 129840-87:
(8*1)+(7*2)+(6*9)+(5*8)+(4*4)+(3*0)+(2*8)+(1*7)=155
155 % 10 = 5
So 129840-87-5 is a valid CAS Registry Number.
129840-87-5Relevant academic research and scientific papers
A general synthesis of 5-alkylidene-4-hydroxy-2-cyclopentenones
Pohmakotr, Manat,Popuang, Supatara
, p. 3783 - 3784 (2007/10/02)
A new general method for the preparation of 5-alkyidene-4-hydroxy-2-cyclopentenones, involving the intramolecular acylation of α- sulfinyl carbanion followed by flash vacuum pyrolysis, is described.
