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199469-63-1

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199469-63-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199469-63-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,4,6 and 9 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 199469-63:
(8*1)+(7*9)+(6*9)+(5*4)+(4*6)+(3*9)+(2*6)+(1*3)=211
211 % 10 = 1
So 199469-63-1 is a valid CAS Registry Number.

199469-63-1Relevant articles and documents

A versatile and efficient method for the synthesis of benz[a]azulenic enones starting from readily available o-(2-furyl)cycloheptatrienylbenzenes

Sasabe, Misako,Houda, Yuuko,Takagi, Hideki,Sugane, Takashi,Bo,Vamamura, Kimiaki

, p. 3786 - 3790 (2000)

A facile, one-pot synthesis of β-(benz[a]azulen-10-yl)-α,β-unsaturated ketones from the corresponding o-(2-furyl)cycloheptatrienylbenzenes is reported. A mechanism involving a novel ring-opening cyclisation reaction by the intramolecular attack of the tropylium ion to the 2-position of the furan ring is proposed. The Royal Society of Chemistry 2000.

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