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109544-20-9

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109544-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109544-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,5,4 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 109544-20:
(8*1)+(7*0)+(6*9)+(5*5)+(4*4)+(3*4)+(2*2)+(1*0)=119
119 % 10 = 9
So 109544-20-9 is a valid CAS Registry Number.

109544-20-9Relevant articles and documents

A new approach to the synthesis of 2-aryl-4-halomethyl-5-methyl-1,3- oxazoles by highly regioselective direct halogenation with NBS or NCS/MeCN

Yamane, Taihei,Mitsudera, Hiroyuki,Shundoh, Takatsugu

, p. 2825 - 2832 (2007/10/03)

A simple and efficient method for the synthesis of 2-aryl-4-bromomethyl-5- methyl-1,3-oxazoles 2 and 2-aryl-4-chloromethyl-5-methyl-1,3-oxazoles 3 is described. The reaction of 2-aryl-4,5-dimethyl-1,3-oxazoles 1 with N-bromosuccinimide and N-chlorosuccini

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