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83074-76-4

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83074-76-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83074-76-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,0,7 and 4 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 83074-76:
(7*8)+(6*3)+(5*0)+(4*7)+(3*4)+(2*7)+(1*6)=134
134 % 10 = 4
So 83074-76-4 is a valid CAS Registry Number.

83074-76-4Relevant articles and documents

Phosphorus- and Sulfur-substituted Allenes in Synthesis, III. - β-Keto Sulfoxides from 3-Alkyn-1-ols via Allenic Sulfoxides

Altenbach, Hans-Josef,Soicke, Hartwig

, p. 1096 - 1104 (2007/10/02)

Allenic sulfoxides 3, readily available by sigmatropic rearrangement of sulfenic esters 2 of 3-alkyn-1-ols 1, can be transformed to give β-keto sulfoxides 9 by nucleophilic addition of diethylamine and subsequent hydrolysis of the formed enamines.

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