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178421-57-3

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178421-57-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 178421-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,4,2 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 178421-57:
(8*1)+(7*7)+(6*8)+(5*4)+(4*2)+(3*1)+(2*5)+(1*7)=153
153 % 10 = 3
So 178421-57-3 is a valid CAS Registry Number.

178421-57-3Upstream product

178421-57-3Relevant articles and documents

Chiral calcium catalysts for asymmetric hydroamination/cyclisation

Wixey, James S.,Ward, Benjamin D.

, p. 5449 - 5451 (2011/06/28)

Calcium complexes supported by chiral 1,2-diamines have been shown to be efficient catalysts for the asymmetric hydroamination of amino-olefin substrates; the calcium complexes [Ca(NNR){N(SiMe3) 2}(THF)] (R = tBu, iPr, Ph, 4-C 6H4F) give enantioselectivities of up to 26% which marks a significant increase based upon literature precedence. The structure of [Ca(NNPh){N(SiMe3)2}(py)] has been computed with density functional methods.

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