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131011-23-9

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131011-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131011-23-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,0,1 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 131011-23:
(8*1)+(7*3)+(6*1)+(5*0)+(4*1)+(3*1)+(2*2)+(1*3)=49
49 % 10 = 9
So 131011-23-9 is a valid CAS Registry Number.

131011-23-9Downstream Products

131011-23-9Relevant articles and documents

Synthesis of Bridged Homoiridoids from Secologanin by Tandem-Knoevenagel-Hetero-Diels-Alder Reactions

Tietze, Lutz F.,Baertels, Christoph

, p. 155 - 160 (2007/10/02)

The tandem-Knoevenagel-hetero-Diels-Alder reaction of the chiral enantiomerically pure monoterpene glucoside secologanin (1) with 1,3-dicarbonyl compounds 6a-d and the analogous compounds 11a-b in the presence of ethylenediammonium diacetate as catalyst leads to the bridged cycloadducts 8a-d and 13a-b in 60-70percent yield, except for 8d.Compound 8b can be transformed into 9 by treatment with methanol and into 10 by treatment with water.The cycloadditions are highly regio- and stereoselective, affording only the bridged but not the annulated compounds as single diastereomers.

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