57443-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57443-91-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,4,4 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57443-91:
(7*5)+(6*7)+(5*4)+(4*4)+(3*3)+(2*9)+(1*1)=141
141 % 10 = 1
So 57443-91-1 is a valid CAS Registry Number.
57443-91-1Relevant academic research and scientific papers
Reactions of 4-Oxo-4H-1-benzopyran-3-carboxaldehydes with Pentane-2,4-dione in Acidic Medium - A New Route to Dihydroxybenzophenone Derivatives
Bandyopadhyay, Chandrakanta,Sur, Kumar Ranabir,Patra, Ranjan
, p. 802 - 803 (2007/10/03)
Reaction of the title aldehyde 1 with acetylacetone 2 gives benzophenone 8 along with the Knoevenagel-type product 5 under acidic conditions.
