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854497-52-2

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854497-52-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 854497-52-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,4,4,9 and 7 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 854497-52:
(8*8)+(7*5)+(6*4)+(5*4)+(4*9)+(3*7)+(2*5)+(1*2)=212
212 % 10 = 2
So 854497-52-2 is a valid CAS Registry Number.

854497-52-2Relevant articles and documents

KHSO4-mediated condensation reactions of tert-butanesulfinamide with aldehydes. Preparation of tert-butanesulfinyl aldimines

Huang, Zhiyan,Zhang, Min,Wang, Yin,Qin, Yong

, p. 1334 - 1336 (2005)

Optically pure tert-butanesulfinyl aldimines 1 were prepared by direct condensation of chiral tert-butanesulfinamide 3 with aldehydes 2 in high yields in the presence of KHSO4. The main advantage of KHSO4 is that it is applicable to the condensation reactions of a variety of aldehydes, including electron deficient and electron rich (hetereo)aromatic aldehydes, as well as aliphatic aldehydes.

Asymmetric vinylogous Mannich reactions: A versatile approach to functionalized heterocycles

Ruan, Shu-Tang,Luo, Jie-Min,Du, Yu,Huang, Pei-Qiang

supporting information; experimental part, p. 4938 - 4941 (2011/11/06)

Asymmetric vinylogous Mannich reaction (VMR) of 2-(tert- butyldimethylsilyloxy)furan (TBSOF, 1) with (RS)- or (S S)-t-BS-imines (3) furnished 5-aminoalkylbutenolides 7a-k in 75-87% yields with anti/syn ratios ranging from 75:25 to 97:3. Butenolides 7a-f,k were readily converted into substituted lactones 8 and 5 and 6-substituted 5-hydroxypiperidin-2-ones 11a-g, which are, in turn, key intermediates for the synthesis of many bioactive compounds.

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