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89809-90-5

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89809-90-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89809-90-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,8,0 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 89809-90:
(7*8)+(6*9)+(5*8)+(4*0)+(3*9)+(2*9)+(1*0)=195
195 % 10 = 5
So 89809-90-5 is a valid CAS Registry Number.

89809-90-5Relevant articles and documents

Phosphine-catalyzed addition/cycloaddition domino reactions of β′-Acetoxy allenoate: Highly stereoselective access to 2-oxabicyclo[3.3.1]nonane and Cyclopenta[a]pyrrolizine

Gu, Yiting,Hu, Pengfei,Ni, Chunjie,Tong, Xiaofeng

, p. 6400 - 6406 (2015)

Two classes of phosphine-catalyzed addition/cycloaddition domino reactions of β′-acetoxy allenoate 1 have been developed. The reaction of 1 with 2-acyl-3-methyl-acrylonitrile 2 readily occurs to give 2-oxabicyclo[3.3.1]nonane 3, furnishing the β′-addition

A few condensation products of aldehydes and cetons with

KLOSA

, p. 299 - 300 (2007/10/07)

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