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108639-54-9

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108639-54-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 108639-54-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,8,6,3 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 108639-54:
(8*1)+(7*0)+(6*8)+(5*6)+(4*3)+(3*9)+(2*5)+(1*4)=139
139 % 10 = 9
So 108639-54-9 is a valid CAS Registry Number.

108639-54-9Upstream product

108639-54-9Downstream Products

108639-54-9Relevant academic research and scientific papers

Asymetric Epoxidation of Homoallylic Alcohols Using Zirconium Tetrapropoxide, Dicyclohexyltartramide, and t-Butyl Hydroperoxide System

Ikegami, Satoru,Katsuki, Tsutomu,Yamaguchi, Masaru

, p. 83 - 84 (2007/10/02)

In the asymmetric epoxidation of homoallylic alcohols, a combination of zirconium tetrapropoxide, dicyclohexyltartramide, and t-butyl hydroperoxide was found to give good enatiometric selectivities ( up to 77percent ee) especially for (Z)-homoallylic substrates.

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