117516-67-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117516-67-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,5,1 and 6 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 117516-67:
(8*1)+(7*1)+(6*7)+(5*5)+(4*1)+(3*6)+(2*6)+(1*7)=123
123 % 10 = 3
So 117516-67-3 is a valid CAS Registry Number.
117516-67-3Relevant articles and documents
PREPARATION AND CYCLIZATION OF ARYLOXYACETALDEHYDE ACETALS; A GENERAL SYNTHESIS OF 2,3-UNSUBSTITUTED BENZOFURANS
Barker, Peter,Finke, Paul,Thompson, Kevan
, p. 257 - 266 (2007/10/02)
A improved method for the preparation of 2,3-unsubstituted benzofurans is described.Specifically, the PPA catalysed cyclization of aryloxyacetaldehyde acetals to give (4-7)-substituted benzofurans has been achieved.
