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21011-86-9

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21011-86-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21011-86-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,1 and 1 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21011-86:
(7*2)+(6*1)+(5*0)+(4*1)+(3*1)+(2*8)+(1*6)=49
49 % 10 = 9
So 21011-86-9 is a valid CAS Registry Number.

21011-86-9Relevant articles and documents

Bismuth triflate-catalyzed three-component Mannich-type reaction

Ollevier, Thierry,Nadeau, Etienne

, p. 9292 - 9295 (2004)

Bismuth triflate catalyzes the Mannich-type reaction of a variety of in situ generated aldimines using aldehydes, anilines, and silyl enol ethers in a three-component reaction. The reaction proceeds rapidly and affords the corresponding protected β-amino

Stereoselective synthesis of meso- and cis-2,6-diarylpiperidin-4-ones catalyzed by L-proline

Aznar, Fernando,Garcia, Ana-Belen,Quinones, Noelia,Cabal, Maria-Paz

, p. 479 - 484 (2008/09/21)

A convenient stereoselective preparation of meso- and cis-2,6- diarylpiperidin-4-ones has been developed by aza-Diels-Alder reaction catalyzed by L-proline from simple and commercially available starting materials. Georg Thieme Verlag Stuttgart.

An imino-Diels-Alder route to meso-2,6-disubstituted-4-piperidones

García, Ana-Belén,Valdés, Carlos,Cabal, María-Paz

, p. 4357 - 4360 (2007/10/03)

A convenient stereoselective preparation of meso-2,6-disubstituted-4- piperidones has been developed by imino-Diels-Alder reaction of 2-amino-1,3-butadienes with imines in the presence of catalytic amount of Cu(TfO)2.

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