Cas 205309-23-5,(1R,4R,5S,7S,11S)-(+)-3-tert-butyl-5-methyl-2,6-dioxa-3-azatricyclo[5.3.1.0<sup>4,11</sup>]undecane

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Check Digit Verification of cas no

The CAS Registry Mumber 205309-23-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,3,0 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 205309-23:
(8*2)+(7*0)+(6*5)+(5*3)+(4*0)+(3*9)+(2*2)+(1*3)=95
95 % 10 = 5
So 205309-23-5 is a valid CAS Registry Number.

205309-23-5Upstream product

16649-50-6 N-tert-Butylhydroxylamine

205309-23-5Downstream Products

205309-23-5Relevant academic research and scientific papers

Formation of enantiopure tricyclic compounds by intramolecular 1,3- dipolar cycloaddition of nitrones

Aurich, Hans Guenter,Geiger, Michael,Gentes, Christian,Harms, Klaus,Koester, Heiner

, p. 3181 - 3196 (2007/10/03)

Nitrones 6 prepared from ester 5 underwent an intramolecular cycloaddition affording diastereomeric mixtures of tricyclic compounds 7A/B. These were separated to give the enantiopure compounds 7A and 7B. Starting from aminoalcohol 8 compounds 10A and 10B were formed via nitrones 9, Nitrone 9a yielded the transproduct 10aC in addition. X-ray analyses confirm the structure of TaB and 10aA. Catalytic hydrogenation of compounds 7A and 7B yielded the bicyclic c-aminoalcohols, which were tested as ligands in the enantioselective addition of diethylzinc to benzaldehyde.

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