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91789-08-1

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91789-08-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91789-08-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,8 and 9 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 91789-08:
(7*9)+(6*1)+(5*7)+(4*8)+(3*9)+(2*0)+(1*8)=171
171 % 10 = 1
So 91789-08-1 is a valid CAS Registry Number.

91789-08-1Relevant articles and documents

Synthesis of Substituted Indans as Prostacyclin Analogues

Phialas, Memnon,Sammes, Peter G.,Kennewell, Peter D.,Westwood, Robert

, p. 687 - 695 (2007/10/02)

A route is described to the substituted indans (8) and (10), prepared as analogues of prostaglandin I2 (prostacyclin).Two key steps in the synthesis involve the regiospecific attack of lithium salts from allylic sulphides onto indene oxides and, after oxidation to the corresponding sulphoxides, their reductive rearrangement to the required diols.Using model indene oxides, attempts have been made to direct the stereochemistry of the exocyclic hydroxy group by steric control during formation of the precursor sulphide.

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