125781-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 125781-31-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,5,7,8 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 125781-31:
(8*1)+(7*2)+(6*5)+(5*7)+(4*8)+(3*1)+(2*3)+(1*1)=129
129 % 10 = 9
So 125781-31-9 is a valid CAS Registry Number.
125781-31-9Relevant articles and documents
N-Protected 3-Hydroxypyrroles
Flitsch, Wilhelm,Hohenhorst, Manfred
, p. 397 - 399 (2007/10/02)
Starting from symmetrical imides and (α-haloacetylmethylene)-phosphoranes 2, N-acyl-3-hydroxypyrroles 4 have been prepared by an intramolecular Wittig olefination.The deacylation of 4 was proved using 4b as an example.