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1239683-12-5

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1239683-12-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1239683-12-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,9,6,8 and 3 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1239683-12:
(9*1)+(8*2)+(7*3)+(6*9)+(5*6)+(4*8)+(3*3)+(2*1)+(1*2)=175
175 % 10 = 5
So 1239683-12-5 is a valid CAS Registry Number.

1239683-12-5Relevant articles and documents

Access to a Key Building Block for the Prostaglandin Family via Stereocontrolled Organocatalytic Baeyer–Villiger Oxidation

Zhu, Kejie,Hu, Sha,Liu, Minjie,Peng, Haihui,Chen, Fen-Er

, p. 9923 - 9927 (2019/05/16)

A new protocol for the construction of a crucial bicyclic lactone of prostaglandins using a stereocontrolled organocatalytic Baeyer–Villiger (B-V) oxidation was developed. The key B-V oxidation of a racemic cyclobutanone derivative with aqueous hydrogen peroxide has enabled an early-stage construction of a bicyclic lactone skeleton in high enantiomeric excess (up to 95 %). The generated bicyclic lactone is fully primed with two desired stereocenters and enabled the synthesis of the entire family of prostaglandins according to Corey′s route. Furthermore, the reactivity and enantioselectivity of B-V oxidation of racemic bicyclic cyclobutanones were evaluated and 90–99 % ee was obtained, representing one of the most efficient routes to chiral lactones. This study further facilitates the synthesis of prostaglandins and chiral lactone-containing natural products to promote drug discovery.

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