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842167-70-8

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842167-70-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 842167-70-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,4,2,1,6 and 7 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 842167-70:
(8*8)+(7*4)+(6*2)+(5*1)+(4*6)+(3*7)+(2*7)+(1*0)=168
168 % 10 = 8
So 842167-70-8 is a valid CAS Registry Number.

842167-70-8Relevant articles and documents

Copper-catalyzed allylations of zirconocene intermediates generated from o-alkenyl or o-alkynylbenzyl ether derivatives and zirconocene-butene complex

Ikeuchi, Yutaka,Taguchi, Takeo,Hanzawa, Yuji

, p. 756 - 759 (2007/10/03)

(Chemical Equation Presented) o-Alkenyl or alkynyl benzylzirconocene intermediate, which was readily generated by the reaction of 2-alkoxymethyl-styrene or 2-alkoxymethyl-1-(trimethylsilylethynyl)-benzene derivative with zirconocene-butene complex (Negishi reagent, "Cp 2Zr"), reacted with allyl or propargyl halides in the presence of a catalytic amount of CuCl to give allylation or allenylation products. Conversion to Dane's diene, which is a key intermediate for estrone synthesis, was efficiently carried out by enyne olefin metathesis of the allylation products.

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