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218765-83-4

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218765-83-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 218765-83-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,7,6 and 5 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 218765-83:
(8*2)+(7*1)+(6*8)+(5*7)+(4*6)+(3*5)+(2*8)+(1*3)=164
164 % 10 = 4
So 218765-83-4 is a valid CAS Registry Number.

218765-83-4Relevant articles and documents

A formal synthesis of crinipellin B based on the arene-alkene meta- photocycloaddition reaction

Wender, Paul A.,Dore, Timothy M.

, p. 8589 - 8592 (2007/10/03)

Starting from triethyl phosphonopropionate and 3-nitro-2-methylbenzoic acid, a formal synthesis of crinipellin B was achieved. The strategy draws on the use of a novel version of the arene-alkene meta-photocycloaddition reaction that proceeds with the generation of 4 rings and 4 quaternary stereocenters in one synthetic operation.

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