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111492-56-9

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111492-56-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111492-56-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,4,9 and 2 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 111492-56:
(8*1)+(7*1)+(6*1)+(5*4)+(4*9)+(3*2)+(2*5)+(1*6)=99
99 % 10 = 9
So 111492-56-9 is a valid CAS Registry Number.

111492-56-9Downstream Products

111492-56-9Relevant 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.

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