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204002-77-7

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204002-77-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 204002-77-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,0,0 and 2 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 204002-77:
(8*2)+(7*0)+(6*4)+(5*0)+(4*0)+(3*2)+(2*7)+(1*7)=67
67 % 10 = 7
So 204002-77-7 is a valid CAS Registry Number.

204002-77-7Downstream Products

204002-77-7Relevant articles and documents

Formal desymmetrization by a "Mitsunobu trick" - Enantiomerically pure cis-3,4-Dihydroxypyrroline N-oxides for the enantiodivergent synthesis of trihydroxyindolizidines

Cicchi, Stefano,Nunes Jr., Jose,Goti, Andrea,Brandi, Alberto

, p. 419 - 421 (2007/10/03)

A protocol is presented for a completely enantioselective formal desymmetrization of Cs-symmetric diols by monoproteclion of the corresponding enanliopure C2 diols, followed by an inversion of configuration by a Mitsunobu reaction ("Mitsunobu trick"). Its application to the unprecedented synthesis of enantiopure cis-3,4-dihydroxypyrroline N-oxides, employed in the enantiodivergent synthesis of two selectively protected 1,2,7-trihydroxyindolizidines, is also reported.

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