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172946-14-4

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172946-14-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172946-14-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,9,4 and 6 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 172946-14:
(8*1)+(7*7)+(6*2)+(5*9)+(4*4)+(3*6)+(2*1)+(1*4)=154
154 % 10 = 4
So 172946-14-4 is a valid CAS Registry Number.

172946-14-4Relevant articles and documents

Preparation of 3-methylenesilacyclobutane and its use in organic synthesis

Okada, Kenji,Matsumoto, Kozo,Oshima, Koichiro,Utimoto, Kiitiro

, p. 8067 - 8070 (2007/10/02)

Treatment of 3-methylene-1,1-diphenylsilacyclobutane (1a) with dihalo-methyllithium provided ring expanded 2-halo-4-methylenesilacyclopentane. Heating a mixture of 1a and carbonyl compound such as PhCHO or PhCOMe at reflux in 1,2-dichloroethane afforded 5-methylene-1,1-diphenyl-2-oxa-1-silacyclohexane which was converted into 3-methylene-1,5-alkanediol monomethyl ether upon treatment with dimethyl acetal in the presence of Lewis acid catalyst. Treatment of ketoaldehyde (PhCOCH2CH2CHO) with 1a under BF3 · OEt2 catalysis gave 3-methylene-1-phenyl-8-oxabicyclo[3.2.1]octane in one pot.

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