71978-92-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71978-92-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,9,7 and 8 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 71978-92:
(7*7)+(6*1)+(5*9)+(4*7)+(3*8)+(2*9)+(1*2)=172
172 % 10 = 2
So 71978-92-2 is a valid CAS Registry Number.
71978-92-2Relevant articles and documents
A convergent synthesis of optically active aspyrone
Sugiyama,Murayama,Yamashita
, p. 7343 - 7344 (2007/10/02)
Aspyrone (1) was elaborated in an optically pure form by the key reaction involving a nucleophilic addition of δ-lactone enolate to 2-tosyloxyaldehyde and a subsequent in situ formation of epoxide.
