142991-74-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142991-74-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,9,9 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 142991-74:
(8*1)+(7*4)+(6*2)+(5*9)+(4*9)+(3*1)+(2*7)+(1*4)=150
150 % 10 = 0
So 142991-74-0 is a valid CAS Registry Number.
142991-74-0Relevant articles and documents
A FACILE AND CONVENIENT SYNTHETIC METHOD FOR 3-TRIFLUOROACETYLPYRROLES
Okada, Etsuji,Masuda, Ryoichi,Hojo, Masaru,Yoshida, Reiko
, p. 1435 - 1441 (2007/10/02)
3-Trifluoroacetylpyrroles are easily obtained in excellent yields by oxygen-nitrogen exchange reaction of β-trifluoroacetylvinyl ethers with 2,2-dimethoxyethylamine and subsequent cyclodehydration of the products.