16297-09-9 Usage
Physical state
Yellow liquid at room temperature
Uses
Intermediate in the synthesis of pharmaceuticals, agrochemicals, and other fine chemicals; production of crop protection products; building block in the development of new materials
Importance
Versatile chemical, crucial in the development of various chemical products, plays a significant role in the field of organic synthesis.
Check Digit Verification of cas no
The CAS Registry Mumber 16297-09-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,2,9 and 7 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 16297-09:
(7*1)+(6*6)+(5*2)+(4*9)+(3*7)+(2*0)+(1*9)=119
119 % 10 = 9
So 16297-09-9 is a valid CAS Registry Number.
16297-09-9Relevant articles and documents
Chambers, R. D.,Heaton, C. A.,Musgrave, W. K. R.,Chadwick, L.
, p. 1700 - 1703 (1969)
Synthesis of difluorinated pyridinecarboxaldehyde via electrophilic fluorination
Ko, Yoon-Joo,Park, Kyung-Bae,Shim, Seung-Bo,Shin, Jung-Hyu
, p. 755 - 759 (2008/03/28)
An efficient synthesis of novel 3,5-difluoropyridine-4-carboxaldehyde using N-fluoro-benzenesulfonimide (NSFi) is described. Difluorination was achieved through the reaction of 3,5-dihalo-1,3-dioxolane pyridine with n-butyllithium followed by N-fluorobenzenesulfonimide at -120 °C in good to high yields. Maintaining the low temperature during the transmetallation was found to be critical for the selective formation of the difluoro-susbstitution over the monofluoro one.
