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220009-45-0

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220009-45-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220009-45-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,0,0 and 9 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 220009-45:
(8*2)+(7*2)+(6*0)+(5*0)+(4*0)+(3*9)+(2*4)+(1*5)=70
70 % 10 = 0
So 220009-45-0 is a valid CAS Registry Number.

220009-45-0Relevant articles and documents

Synthesis and evaluation of C8-substituted 4.5-spiro lactams as Glycogen Phosphorylase a inhibitors

Loughlin, Wendy A.,Schweiker, Stephanie S.,Jenkins, Ian D.,Henderson, Luke C.

, p. 1576 - 1582 (2013/03/29)

An effective synthesis of 4.5-spiro lactams 28/29, has been completed in nine steps with an overall yield of 5.8%. The 4.5-spiro lactams were made from 2-allyl-Cbz-Pro-OMe 21, which was converted into the corresponding alcohol 22 via a hindered borane reaction with (2-methylbutyl)2borane. Subsequent Swern oxidation of 22 gave novel aldehyde 23. Aldehyde 23 was treated under Bucherer-Bergs reaction conditions to give hydantoin 26, which was opened to the corresponding amino acid 30 using di-tert-butyl dicarbonate and DMAP followed by hydrolysis. Treatment of amino acid 30 with acidic methanol gave 4.5-spiro lactams 28/29. Only 4.5-spiro lactam 29 displayed moderate activity against GPa with an IC50 of 241 μM.

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