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137554-03-1

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137554-03-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137554-03-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,5 and 4 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 137554-03:
(8*1)+(7*3)+(6*7)+(5*5)+(4*5)+(3*4)+(2*0)+(1*3)=131
131 % 10 = 1
So 137554-03-1 is a valid CAS Registry Number.

137554-03-1Upstream product

137554-03-1Downstream Products

137554-03-1Relevant articles and documents

Allylation of quinones bu allylic indium reagents

Araki, Shuki,Katsumura, Nobuhito,Butsugan, Yasuo

, p. 7 - 24 (2007/10/02)

Allylation of a variety of quinones by allylic indium sesquihalides was studied.Reactions of unsubstituted p-benzoquinone with allylindium, prenylindium, and geranylindium reagents gave, after oxidation with silver oxide, the corresponding allylated quinones in good yields.These reactions appear to proceed via 1,2-addition of the allylic indium reagents at the γ-carbon followed by sigmatropic rearrangement.Substituted quinones reacted with allylindium reagent giving excellent yields of allylquinols, whereas with prenylindium and geranylindium reagents, trisubstituted quinones gave diprenylcyclohexene-1,4-diones and 2,3-disubstituted quinones gave mixtures of prnylhydroquinones and diprenylcyclohexene-1,4-diones.In the prenylation of haloquinones, 1,2-addition, sigmatropic rearrangement, and elimination of indium(III) halide occurred in sequence yielding prenylquinones. 2-Hydroxy- and 2-methoxy-1,4-naphthoquinones gave α-addition products with prenylindium and cinnamylindium reagents.

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