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5022-20-8

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5022-20-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5022-20-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,0,2 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 5022-20:
(6*5)+(5*0)+(4*2)+(3*2)+(2*2)+(1*0)=48
48 % 10 = 8
So 5022-20-8 is a valid CAS Registry Number.

5022-20-8Downstream Products

5022-20-8Relevant articles and documents

Synthesis of the Mammea Coumarins. Part 4. Stereochemical and Regiochemical Studies, and Synthesis of (-)-Mammea B/BB

Crombie, Leslie,Jones, Raymond C. F.,Palmer, Christopher J.,Begley, Michael J.

, p. 353 - 358 (2007/10/02)

Acylation of phloroglucinol with (S)-2-methylbutyryl chloride followed by Pechmann condensation with ethyl 3-oxohexanoate, or acylation of 5,7-dihydroxy-4-propylcoumarin with (S)-2-methylbutyryl chloride gave an 8-(S)-acylcoumarin that was C-alkylated to afford natural (-)-mammea B/BB: the configuration of the 2-methylbutyryl moiety in the natural coumarins was thus demonstrated to be (S)-Surangin B was likewise prepared as a mixture of 1'S, 2''S)- and (1'R, 2''S)-stereoisomers.The crystal structure and conformation of a 6-acylcoumarin that establishes the orientation of other synthetic coumarins is reported.

Synthesis of mammeins and surangin A

Crombie,Jones,Palmer

, p. 2929 - 2932 (2007/10/02)

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