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73746-82-4

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73746-82-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73746-82-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,7,4 and 6 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 73746-82:
(7*7)+(6*3)+(5*7)+(4*4)+(3*6)+(2*8)+(1*2)=154
154 % 10 = 4
So 73746-82-4 is a valid CAS Registry Number.

73746-82-4Relevant articles and documents

Asymmetric Synthesis of 2-Substituted Butyrolactones and Valerolactones

Meyers, A. I.,Yamamoto, Yukio,Mihelich, Edward D.,Bell, Richard A.

, p. 2792 - 2796 (2007/10/02)

The use of chiral oxazolines 1, 2, 5, and 8 under asymmetrically induced alkylation conditions gave α-substituted oxazolines 3, 6, 9, and 13 which were hydrolyzed to α-substituted butyro- and valerolactones 4 and 11.Either enantiomer of the lactones could be prepared in predictable absolute configuration by reversing the order of alkyl group introduction.The lactones were prepared in 60-86 percent enantiomeric excess which was determined by either chemical correlation or high-pressure liquid chromatography of the diastereomers 10.

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