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181656-27-9

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181656-27-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 181656-27-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,6,5 and 6 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 181656-27:
(8*1)+(7*8)+(6*1)+(5*6)+(4*5)+(3*6)+(2*2)+(1*7)=149
149 % 10 = 9
So 181656-27-9 is a valid CAS Registry Number.

181656-27-9Upstream product

181656-27-9Downstream Products

181656-27-9Relevant academic research and scientific papers

A general route to 5-substituted-2-furylacetic acids: a brief synthesis of plakorsin B

Hayes, Simon J.,Knight, David W.,Smith, Andrew W.T.,O'Halloran, Mark J.

, p. 717 - 719 (2010)

3,4-Dihydroxy-5-alkynylcarboxylic acids, readily obtained by the addition of lithium acetylides to α-acetoxysuccinic anhydride followed by reduction and hydrolysis, undergo smooth silver(I)-catalysed 5-endo-dig cyclisations and in situ dehydration to give excellent overall yields of 5-substituted-2-furylacetic acids, including the natural metabolite plakorsin B.

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