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117749-44-7

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117749-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117749-44-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,7,4 and 9 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 117749-44:
(8*1)+(7*1)+(6*7)+(5*7)+(4*4)+(3*9)+(2*4)+(1*4)=147
147 % 10 = 7
So 117749-44-7 is a valid CAS Registry Number.

117749-44-7Relevant articles and documents

Unified synthesis of quinone sesquiterpenes based on a radical decarboxylation and quinone addition reaction

Ling, Taotao,Poupon, Erwan,Rueden, Erik J.,Kim, Sun H.,Theodorakis, Emmanuel A.

, p. 12261 - 12267 (2007/10/03)

A unified synthesis of several quinone sesquiterpenes is described herein. Essential to this strategy is a novel radical addition reaction that permits the attachment of a fully substituted bicyclic core 16 to a variably substituted quinone 10. The addition product 15 can be further functionalized, giving access to natural products with a high degree of oxygenation at the quinone unit. The quinone addition reaction is characterized by excellent chemoselectivity, taking place only at conjugated and unsubstituted double bonds, and regioselectivity, being strongly influenced by the resonance effect of heteroatoms located on the quinone ring. These features were successfully applied to the synthesis of avarol (1), avarone (2), methoxyavarones (4, 5), ilimaquinone (6), and smenospongidine (7), thereby demonstating the synthetic value of this new method.

THE INVENTION OF RADICAL CHAIN REACTIONS. PART XIV. A DECARBOXILATIVE RADICAL ADDITION TO QUINONES

Barton, Derek H. R.,Bridon, Dominique,Zard, Samir Z.

, p. 5307 - 5314 (2007/10/02)

Irradiation of esters 3 derived from aliphatic or alicyclic carboxylic acids and N-hydroxy-2-thiopyridone in the presence of various quinones gives high yields of the corresponding adducts (e.g. 9) with net loss of carbon dioxide.

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