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176438-22-5

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176438-22-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 176438-22-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,6,4,3 and 8 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 176438-22:
(8*1)+(7*7)+(6*6)+(5*4)+(4*3)+(3*8)+(2*2)+(1*2)=155
155 % 10 = 5
So 176438-22-5 is a valid CAS Registry Number.

176438-22-5Relevant articles and documents

First synthetic method for the preparation of 6-unsubstituted-2,3-dihydro-1,3-oxazin-4-ones

Bertolini, Giorgio,Aquino, Mario,Ferrario, Francesco,Pavich, Gianfranco,Zaliani, Andrea,Sala, Alberto

, p. 3358 - 3361 (2007/10/03)

The first synthetic pathway to synthesize 6-unsubstituted-2,3-dihydro-1,3-oxazin-4-ones is described. The α-formylation of the starting amide and the cyclization of the α-formylamide with a desired aldehyde under acidic conditions gave compounds 5a-h (R = nPr, iPr, cPr, cHex, Ph, CH2Ph, nHex, and R1 = H, Me). This strategy was used with little modification for the preparation of new monocyclic organic nitrates such as 2a-c (2a (R = Ph, R1 = H, and R2 = H), 2b (R = Ph, R1 = H, and R2 = Me), and 2c ( R = H, R1 = Ph, and R2 = H).

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