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171925-21-6

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171925-21-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 171925-21-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,9,2 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 171925-21:
(8*1)+(7*7)+(6*1)+(5*9)+(4*2)+(3*5)+(2*2)+(1*1)=136
136 % 10 = 6
So 171925-21-6 is a valid CAS Registry Number.

171925-21-6Downstream Products

171925-21-6Relevant articles and documents

Synthesis of polyhydroxyindolizidines from 5,6-dihydro-2H-pyran-2-one

Socha, Dariusz,Jurczak, Margarita,Chmielewski, Marek

, p. 315 - 318 (2001)

(1aR,5aR,5bS,6S,7S)-6,7-Di-tert-butoxy-5-oxo-pyrrolidino[1,2-b]isoxazolidino [4,5-c]tetrahydropyran (8) prepared by (1,3)-dipolar cycloaddition of the cyclic nitrone 6 derived from tartaric acid to 5,6-dihydro-2H-pyran-2-one (7) was transformed into indolizidine 11 via a sequence of reactions involving methanolysis of the lactone ring, intramolecular alkylation of the nitrogen atom promoted by a carbontetrabromide-triphenylphosphine mixture and hydrogenolysis of the N-O bond. Decarboxylation of 11 provided known 7-hydroxylentiginosine derivative 14, whereas oxidative decarboxylation gave indolizidine 15 structurally related to castanospermine.

The Chemistry of Castanospermine, Part IV1: Synthetic Modifications at C-8

Furneaux, Richard H.,Gainsford, Graeme J.,Mason, Jennifer M.,Tyler, Peter C.,Hartley, Oliver,Winchester, Bryan G.

, p. 12611 - 12630 (2007/10/02)

New methods for the selective functionalisation of castanospermine has enabled the synthesis of analogues and derivatives selectively modified at C-8.

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