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138173-40-7

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138173-40-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138173-40-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,1,7 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 138173-40:
(8*1)+(7*3)+(6*8)+(5*1)+(4*7)+(3*3)+(2*4)+(1*0)=127
127 % 10 = 7
So 138173-40-7 is a valid CAS Registry Number.

138173-40-7Downstream Products

138173-40-7Relevant articles and documents

The Total Synthesis of Agglomerin A and (+/-)-Carolinic Acid. A General Method for the Preparation of 3-Acyl Tetronic Acids Via Direct Acylation of O-Methyl 3-Stannyl Tetronates

Ley, Steven V.,Trudell, Mark L.,Wadsworth, David J.

, p. 8285 - 8296 (2007/10/02)

A variety of O-methyl-3-acyl tetronates were prepared in good yield from the corresponding acid chlorides via a palladium catalyzed acylation of O-methyl 3-(tri-n-butylstannyl) tetronate 5.This new synthetic method was the exploited for the total synthesis of the novel antibiotic agglomerin A 3a, as well as the fungal metabolite (+/-)-carolinic acid 15.

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