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1233335-57-3

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1233335-57-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1233335-57-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,3,3,3 and 5 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1233335-57:
(9*1)+(8*2)+(7*3)+(6*3)+(5*3)+(4*3)+(3*5)+(2*5)+(1*7)=123
123 % 10 = 3
So 1233335-57-3 is a valid CAS Registry Number.

1233335-57-3Downstream Products

1233335-57-3Relevant articles and documents

Efficient total synthesis of ammosamide B

Reddy, P. V. Narasimha,Banerjee, Biplab,Cushman, Mark

supporting information; experimental part, p. 3112 - 3114 (2010/08/20)

A total synthesis of ammosamide B, a metabolite of the marine-derived Streptomyces strain CNR-698, has been executed in nine steps and 6.9% overall yield. The key step involves the condensation of a 4,6-diBoc-protected 1,3,4,6-tetraaminobenzene derivative with dimethyl 2-ketoglutaconate, which effectively constructs the pyrrolidinone ring and the quinoline ring in a single step. This contributes a unique approach to the synthesis of pyrroloquinoline alkaloids that offers the advantages of brevity and relatively high overall yield.

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