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855174-77-5

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855174-77-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 855174-77-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,5,1,7 and 4 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 855174-77:
(8*8)+(7*5)+(6*5)+(5*1)+(4*7)+(3*4)+(2*7)+(1*7)=195
195 % 10 = 5
So 855174-77-5 is a valid CAS Registry Number.

855174-77-5Relevant articles and documents

Tetralone esters as intermediates for the synthesis of podophyllotoxin derivatives via cyclopropanation of chalcones

Nanjundaswamy,Shashikanth,Anjanamurthy,Rai, K.M. Lokanatha

, p. 1179 - 1191 (2000)

Cyclopropyl ester (8a-f) were synthesized by the cyclopropanation of chalcones (7a-e) in dry benzene using powdered sodium in 80-85% yield. Preparation of tetralone ester (4a-e), an intermediate for the synthesis of podophyllotoxin derivatives by Lewis ac

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