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131497-73-9

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131497-73-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131497-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,4,9 and 7 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131497-73:
(8*1)+(7*3)+(6*1)+(5*4)+(4*9)+(3*7)+(2*7)+(1*3)=129
129 % 10 = 9
So 131497-73-9 is a valid CAS Registry Number.

131497-73-9Upstream product

131497-73-9Downstream Products

131497-73-9Relevant articles and documents

Thioalkylation of Enolates, III. Stereoselective Synthesis of Steroids and Related Compounds, II. α-Thioalkylation of Zinc Dienolates to 4-Substituted 1-tert-Butoxy-7a-methyl-hexahydroinden-5-ones

Groth, Ulrich,Koehler, Thomas,Taapken, Thomas

, p. 665 - 668 (2007/10/02)

α-Alkylation of the α,β-unsaturated ketone 1 at C-4 has been achieved by thioalkylation of the corresponding zinc dienolate with α-chlorosulfides of type 2.The desulfurization of the β-(phenylthio)ketones 4 leads directly to the 4-substituted hexahydroind

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