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21759-67-1

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21759-67-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21759-67-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,5 and 9 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21759-67:
(7*2)+(6*1)+(5*7)+(4*5)+(3*9)+(2*6)+(1*7)=121
121 % 10 = 1
So 21759-67-1 is a valid CAS Registry Number.

21759-67-1Relevant articles and documents

Thermal Rearrangement of Some 3-Alkyl-2-aryltetrahydro-1,3-oxazine N-oxides. Synthesis of 2-Alkyl-7-aryltetrahydro-1,6,2-dioxazepines

Lann, Martine Le,Saba, Shahrokh,Shoja, Massud

, p. 1789 - 1794 (2007/10/02)

Several 2-alkyl-7-aryltetrahydro-1,6,2-dioxazepines 5a-i have been synthesized by a Meisenheimer-type rearrangement of 3-alkyl-2-aryltetrahydro-1,3-oxazine N-oxides 4a-i.These dioxazepines have not been previously described and for the first time compound

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