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257861-23-7

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257861-23-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257861-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,8,6 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 257861-23:
(8*2)+(7*5)+(6*7)+(5*8)+(4*6)+(3*1)+(2*2)+(1*3)=167
167 % 10 = 7
So 257861-23-7 is a valid CAS Registry Number.

257861-23-7Relevant articles and documents

A metathesis-based approach to the synthesis of furans

Donohoe, Timothy J.,Fishlock, Lisa P.,Lacy, Adam R.,Procopiou, Panayiotis A.

, p. 953 - 956 (2007/10/03)

(Chemical Equation Presented) The enol ether-olefin ring-closing metathesis reaction has been employed to generate 2,3-dihydrofurans that are equipped with a leaving group. These substrates are at the correct oxidation state to undergo an acid-catalyzed a

Preparation and Reactions of Alkoxy Allylic Zirconium Reagents Derived from Acetals of α,β-Unsaturated Aldehydes: Remarkable Substituent Effects on Regioselectivity

Ito, Hisanaka,Taguchi, Takeo,Hanzawa, Yuji

, p. 7873 - 7876 (2007/10/02)

Alkoxy allylic zirconium reagents, prepared from acetals of α,β-unsaturated aldehydes and "Cp2Zr", react with carbonyl compounds to give 1,2-diols or γ-hydroxy aldehyde derivatives. Key Words: zirconocene; alkoxy allylic zirconium reagent; allylic 1,2-dio

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