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73642-90-7

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73642-90-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73642-90-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,6,4 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 73642-90:
(7*7)+(6*3)+(5*6)+(4*4)+(3*2)+(2*9)+(1*0)=137
137 % 10 = 7
So 73642-90-7 is a valid CAS Registry Number.

73642-90-7Relevant articles and documents

Studies on New Synthetic Pathways to Δα,β-Butenolides from α-Methylbutanolides. II. Electrolytic Oxidation of Simple α-Carboxy-α-methylbutanolides

Kawamata, Takeshi,Inayama, Seiichi,Sata, Kazuko

, p. 277 - 281 (2007/10/02)

A new approach to the synthesis of Δα,β-butenolides from γ-butanolides by means of the electrolytic oxidation of α-carboxy-α,γ-dimethyl-γ-butyrolactone (3b) and its α-carboxy-α-methyl analog (3d) resulted in predominant formation of the endocyc

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