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137677-32-8

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137677-32-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137677-32-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,6,7 and 7 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 137677-32:
(8*1)+(7*3)+(6*7)+(5*6)+(4*7)+(3*7)+(2*3)+(1*2)=158
158 % 10 = 8
So 137677-32-8 is a valid CAS Registry Number.

137677-32-8Downstream Products

137677-32-8Relevant articles and documents

syn-Selctive Michael Addition of Lithiated 2-Alkoxyacetates and -acetamides to α,β-Unsaturated Carbonyl Compounds

Kanemasa, Shuji,Nomura, Masafumi,Wada, Eiji

, p. 1735 - 1738 (2007/10/02)

The lithium Z-enolates derived from 2-alkoxyacetates and -acetamides undergo unusual syn-selective Michael addition to α,β-unsaturated carbonyl compounds, where the syn selectivity of the amide enolates is much higher than that of the ester enolates.Factors that influence the stereoselectivity are also discussed.

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