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1227798-49-3

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1227798-49-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1227798-49-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,7,7,9 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1227798-49:
(9*1)+(8*2)+(7*2)+(6*7)+(5*7)+(4*9)+(3*8)+(2*4)+(1*9)=193
193 % 10 = 3
So 1227798-49-3 is a valid CAS Registry Number.

1227798-49-3Relevant academic research and scientific papers

Synthesis of nitrogenated heterocycles by asymmetric transfer hydrogenation of N-(tert-butylsulfinyl)haloimines

Pablo, Oscar,Guijarro, David,Yus, Miguel

, p. 9181 - 9189 (2013/10/08)

Highly optically enriched, protected, nitrogenated heterocycles with different ring sizes have been synthesized by a very efficient methodology consisting of the asymmetric transfer hydrogenation of N-(tert-butylsulfinyl) haloimines followed by treatment with a base to promote an intramolecular nucleophilic substitution process. N-Protected aziridines, pyrrolidines, piperidines, and azepanes bearing aromatic, heteroaromatic, and aliphatic substituents have been obtained in very high yields and diastereomeric ratios up to >99:1. The free heterocycles can be easily obtained by a simple and mild desulfinylation procedure. Both enantiomers of the free heterocycles can be prepared with the same good results by changing the absolute configuration of the sulfur atom of the sulfinyl group.

Asymmetric synthesis of 2-arylpyrrolidines starting from γ-chloro N-(tert-butanesulfinyl)ketimines

Leemans, Erika,Mangelinckx, Sven,De Kimpe, Norbert

body text, p. 3122 - 3124 (2010/09/04)

The enantioselective reductive cyclization of γ-chloro N-(tert-butanesulfinyl)ketimines towards the short and efficient synthesis of (S)- and (R)-2-arylpyrrolidines (ee >99%) is described for the first time by treatment with LiBEt3H and subsequ

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