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20621-69-6

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20621-69-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 20621-69-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,2 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 20621-69:
(7*2)+(6*0)+(5*6)+(4*2)+(3*1)+(2*6)+(1*9)=76
76 % 10 = 6
So 20621-69-6 is a valid CAS Registry Number.

20621-69-6Relevant articles and documents

Synthese de methoxycarbonylindenes, dihydro-1,2 naphtalenes et benzocycloheptene. Obtention des indanones-1, des tetralones-1 et de la benzosuberone correspondantes

Verbel, Joel,Carrie, Robert

, p. 116 - 124 (2007/10/02)

The synthesis of methoxycarbonylindenes, 1,2-dihydro-naphtalenes, and benzocycloheptene starting from the corresponding 1-indanones, 1-tetralones, and benzosuberone is reported.The starting ketones were synthesized by methods described in the literature which were optimized; in some cases new processes are described.

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