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439217-29-5

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439217-29-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 439217-29-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,9,2,1 and 7 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 439217-29:
(8*4)+(7*3)+(6*9)+(5*2)+(4*1)+(3*7)+(2*2)+(1*9)=155
155 % 10 = 5
So 439217-29-5 is a valid CAS Registry Number.

439217-29-5Relevant articles and documents

Synthesis of the ABC ring system of Azaspiracid. 2. A systematic study into the effect of C(16) and C(17) substitution on bis-spirocyclization.

Carter, Rich G,Graves, David E,Gronemeyer, Melissa A,Tschumper, Gregory S

, p. 2181 - 2184 (2007/10/03)

[reaction: see text] A systematic study into the effect of C(16) and C(17) substitution on the stereochemical outcome of bis-spirocyclization to form the ABC ring system of azaspiracid is disclosed. Successful construction of the natural 10R,13R bis-spirocyclic stereochemistry has been accomplished on the C(16) benzyloxy-containing precursor.

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