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657428-65-4

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657428-65-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 657428-65-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,7,4,2 and 8 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 657428-65:
(8*6)+(7*5)+(6*7)+(5*4)+(4*2)+(3*8)+(2*6)+(1*5)=194
194 % 10 = 4
So 657428-65-4 is a valid CAS Registry Number.

657428-65-4Downstream Products

657428-65-4Relevant articles and documents

Synthesis of medium-sized cyclic γ-haloketones by radical mediated ring-opening reaction of Lewis acid catalyzed (2+2)-cycloaddition products

Takasu, Kiyosei,Nagao, Satoshi,Ihara, Masataka

, p. 1005 - 1008 (2005)

Novel entry to synthesize medium-sized cycloalkanones is described. Thus, employment of catalytic (2+2)-cycloaddition for cyclic silyl enol ether followed by radical mediated ring-opening reaction provided medium-sized γ-halocycloalkanones.

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