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303183-83-7

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303183-83-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 303183-83-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,3,1,8 and 3 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 303183-83:
(8*3)+(7*0)+(6*3)+(5*1)+(4*8)+(3*3)+(2*8)+(1*3)=107
107 % 10 = 7
So 303183-83-7 is a valid CAS Registry Number.

303183-83-7Relevant articles and documents

Asymmetric oxidation of 3-alkyl-1,2-cyclopentanediones. Part 2: Oxidative ring cleavage of 3-alkyl-1,2-cyclopentanediones: Synthesis of 2-alkyl-γ-lactone acids

Paju, Anne,Kanger, Tonis,Pehk, Tonis,Lindmaa, Rasmus,Mueuerisepp, Aleksander-Mati,Lopp, Margus

, p. 1565 - 1573 (2003)

Ti(OiPr)4/diethyl tartrate/tBuOOH system oxidizes 3-alkyl-1,2-cyclopentanediones resulting in hydroxylated ring cleavage products 2-alkyl-γ-lactone acids, in high enantioselectivity (~95% ee) and satisfactory isolated yields (up to 55%).

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