856807-23-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 856807-23-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,6,8,0 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 856807-23:
(8*8)+(7*5)+(6*6)+(5*8)+(4*0)+(3*7)+(2*2)+(1*3)=203
203 % 10 = 3
So 856807-23-3 is a valid CAS Registry Number.
856807-23-3Relevant academic research and scientific papers
A New Procedure for Regiospecific Syntheses of Benzopyran-1-ones
Hauser, Frank M.,Baghdanov, Vaceli M.
, p. 4676 - 4681 (2007/10/02)
A new, general route to benzopyran-1-ones 33 from phthalaldehydic acids 27 and nitroalkanes 28 is described.The sequence permits strightforward variation of both the 3-substituent and the pattern of functionalization on the aromatic ring of the benzopyran
