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221045-94-9

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221045-94-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221045-94-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,4 and 5 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 221045-94:
(8*2)+(7*2)+(6*1)+(5*0)+(4*4)+(3*5)+(2*9)+(1*4)=89
89 % 10 = 9
So 221045-94-9 is a valid CAS Registry Number.

221045-94-9Relevant articles and documents

Simple amino silyl ether organocatalyst for asymmetric hetero Diels–Alder reaction of isatins with enones

Parasuraman, Perumalsamy,Ganesan, Divakar,Begum, Zubeda,Seki, Chigusa,Okuyama, Yuko,Kwon, Eunsang,Uwai, Koji,Tokiwa, Michio,Tokiwa, Suguru,Takeshita, Mitsuhiro,Nakano, Hiroto

supporting information, p. 454 - 464 (2021/05/21)

New two catalysts component system comprising of a primary β-amino silyl ethers as an organocatalyst and N-protected amino acids as a co-catalyst put together worked as an efficient organocatalyst system in the hetero Diels–Alder reaction of isatins with enones affording the chiral spirooxindole-tetrahydropyranones in good chemical yields and stereoselectivities (up to 94%, up to dr 78:22., up to 85% ee).

Chirality n-heterocyclic carbine precursor compound with benzoglioxaline frameworks and preparation method and application thereof

-

Paragraph 0073; 0078; 0080; 0081, (2018/09/14)

The invention discloses chirality n-heterocyclic carbine precursor compound with benzoglioxaline frameworks and a preparation method and application thereof. Five steps of reaction can simply and effectively compound a series of chirality benzoglioxaline

Characterization of lassa virus cell entry inhibitors: Determination of the active enantiomer by asymmetric synthesis

Whitby, Landon R.,Lee, Andrew M.,Kunz, Stefan,Oldstone, Michael B.A.,Boger, Dale L.

scheme or table, p. 3771 - 3774 (2010/02/28)

The comparative characterization of a series of 4-acyl-1,6-dialkylpiperazin-2-ones as potent cell entry inhibitors of the hemorrhagic fever arenavirus Lassa (LASV) is disclosed. The resolution and examination of the individual enantiomers of the prototypi

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