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223608-50-2

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223608-50-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 223608-50-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,6,0 and 8 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 223608-50:
(8*2)+(7*2)+(6*3)+(5*6)+(4*0)+(3*8)+(2*5)+(1*0)=112
112 % 10 = 2
So 223608-50-2 is a valid CAS Registry Number.

223608-50-2Relevant articles and documents

Synthesis of [7-3H]valienamine, [7-3H]valienone, [7-3H]valiolamine and [7-3H]valiolone from validamycin A

Lee, Sungsook,Tornus, Ingo,Dong, Haijun,Groeger, Stefan

, p. 361 - 372 (2007/10/03)

To investigate the biosynthetic pathway to the cyclitol moieties of acarbose and validamycin A, [7-3H]valienamine, [7-3H]valienone, [7-3H]valiolamine and [7-3H]valiolone were synthesized as plausible precursors. Valienamine together with validamine was isolated from the degradation of validamycin A by Flavobacterium saccharophilum and served as starting material for the synthesis. Validamine was removed partially at the stage of tritylation and completely after the oxidation of the primary hydroxy group at C-7 to the aldehyde. The resulting valienamine aldehyde was reduced with tritiated sodium borohydride to produce [7-3H]valienamine. The latter was converted to [7-3H]valiolamine by a synthetic route described in the literature. The 3H-labeled amines were oxidized to [7-3H]valienone and [7-3H]valiolone, respectively, using 3,5-di-tert-butyl-1,2-bezoquinone (DBQ) followed by hydrolysis with oxalic acid.

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