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156909-45-4

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156909-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156909-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,0 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 156909-45:
(8*1)+(7*5)+(6*6)+(5*9)+(4*0)+(3*9)+(2*4)+(1*5)=164
164 % 10 = 4
So 156909-45-4 is a valid CAS Registry Number.

156909-45-4Relevant articles and documents

Structural study-guided development of versatile phase-transfer catalysts for asymmetric conjugate additions of cyanide

Provencher, Brian A.,Bartelson, Keith J.,Liu, Yan,Foxman, Bruce M.,Deng, Li

, p. 10565 - 10569 (2011)

Unprecedented phase-transfer catalysts for the first example of an organocatalytic asymmetric conjugate addition of cyanide with acetone cyanohydrin are reported (see scheme). Utilizing an accessible cupreidinium salt and a cyanation reagent suitable for industrial scale, this reaction holds significant promise for practical asymmetric synthesis. The catalysts were developed as a result of key structural insights gained by X-ray analysis. Copyright

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