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213970-70-8

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213970-70-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 213970-70-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,9,7 and 0 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 213970-70:
(8*2)+(7*1)+(6*3)+(5*9)+(4*7)+(3*0)+(2*7)+(1*0)=128
128 % 10 = 8
So 213970-70-8 is a valid CAS Registry Number.

213970-70-8Relevant articles and documents

An alternate method for the synthesis of 2-aryl/alkyl-5-bromo-7-methoxy benzofurans; application to the synthesis of Egonol, Homoegonol, and analogs via Heck reaction

More, Kishor R.,Mali

, p. 7496 - 7504 (2016/11/11)

We herein report the general, versatile, and convenient method for the synthesis of 2-arly/alkyl-5-bromo-7-methoxy benzofurans from easily available o-Vanillin in five steps. These benzofurans was successfully converted into biological active natural products Egonol, Homoegonol, and analogous on applying Heck reaction using ethyl/methyl acrylate in the presence of palladium catalyst.

Facile preparation of 2-arylbenzo[b]furan molecules and their anti-inflammatory effects

Hwang, Jung Woon,Choi, Da Hye,Jeon, Jae-Ho,Kim, Jin-Kyung,Jun, Jong-Gab

experimental part, p. 965 - 970 (2010/11/02)

An efficient and practical preparation of 2-arylbenzo[b]furan molecules including natural egonol, XH-14, ailanthoidol, and unnatural derivatives is demonstrated using Sonogashira coupling, iodine induced cyclization and Wittig reaction. Anti-inflammatory effects of the prepared benzo[b]furans were examined in lipopolysaccharide (LPS)-stimulated RAW 264-7 macrophages. The results showed that ailanthoidol, XH-14 and three other unnatural derivatives (9-10, 13) inhibited significantly the production of inflammatory mediator nitric oxide without showing cytotoxicity.

A new approach to 2-aryl-7-alkoxy-benzofurans: Synthesis of ailanthoidol, a natural neolignan

Fuganti, Claudio,Serra, Stefano

, p. 5609 - 5610 (2007/10/03)

A general method of synthesis of 2-aryl-7-alkoxy-benzofurans is described using a benzoannulation reaction as key step. The usefulness of this approach is shown in the new synthesis of ailanthoidol, a benzofuranoid neolignan isolated from the tree Zanthox

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