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38563-49-4

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38563-49-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 38563-49-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,5,6 and 3 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 38563-49:
(7*3)+(6*8)+(5*5)+(4*6)+(3*3)+(2*4)+(1*9)=144
144 % 10 = 4
So 38563-49-4 is a valid CAS Registry Number.

38563-49-4Relevant articles and documents

Reactivity of aldehydes with semi-stabilised arsonium ylide anions: Synthesis of terminal (E)-l,3-dienes

Habrant, Damien,Stengel, Bruno,Meunier, Stephane,Mioskowski, Charles

, p. 5433 - 5440 (2008/02/10)

A study of the reactivity of semi-stabilised arsonium ylide anions in olefinalion reactions is presented. The different ylide anions were generated by the addition of nBuLi to various arsonium halide derivatives: [Ph 2As(R)R']+X , where R and R′ are methyl, allyl, prenyl or benzyl groups. By using diallyldiphenylarsonium bromide (R = R′ = allyl) an olefinationprotocol was optimised allowing the efficient transformation of aliphatic aldehydes into terminal 1,3-dienes with a high selectivity for the E isomer (E/Z ratios ranging from 90:10 to 97:3). The olefination reactions of aldehydes with dissymmetric arsonium halides (R≠R′) are very chemoselective; with arsonium ylide anions the benzyl moiety is more reactive than the allyl moiety which is much more reactive than prenyl and methyl groups. Based on the experimental results, a mechanism is proposed for the reaction.

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