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857811-99-5

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857811-99-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857811-99-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,8,1 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 857811-99:
(8*8)+(7*5)+(6*7)+(5*8)+(4*1)+(3*1)+(2*9)+(1*9)=215
215 % 10 = 5
So 857811-99-5 is a valid CAS Registry Number.

857811-99-5Relevant articles and documents

Pd-Catalyzed Nazarov-Type Cyclization: Application in the Total Synthesis of β-Diasarone and Other Complex Cyclopentanoids

Singh, Bara,Bankar, Siddheshwar K.,Ramasastry

, p. 1043 - 1048 (2022/02/05)

We describe the palladium-catalyzed Nazarov-type cyclization of easily accessible (hetero)arylallyl acetates to pentannulated (hetero)arenes. This method provides ready access to various types of bi-, tri-, tetra-, and pentacyclic cyclopentanoids under ne

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