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41920-28-9

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41920-28-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 41920-28-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,9,2 and 0 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 41920-28:
(7*4)+(6*1)+(5*9)+(4*2)+(3*0)+(2*2)+(1*8)=99
99 % 10 = 9
So 41920-28-9 is a valid CAS Registry Number.

41920-28-9Relevant articles and documents

Geminal difunctionalization of α-diazo arylmethylphosphonates: Synthesis of fluorinated phosphonates

Zhou, Yujing,Zhang, Yan,Wang, Jianbo

, p. 10444 - 10453 (2016)

A general approach towards diverse fluorinated phosphonates via geminal difunctionalization reactions of α-diazo arylmethylphosphonates is described. The diazo functionality (RR′CN2) is successfully converted to RR′CF2, RR′CHF, RR′CFBr or RR′CFNR′′2 groups by employing different fluorination reagents. A variety of fluorinated organophosphorus compounds were readily accessed in good to excellent yields from a common type of precursor.

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