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67628-16-4

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67628-16-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67628-16-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,6,2 and 8 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 67628-16:
(7*6)+(6*7)+(5*6)+(4*2)+(3*8)+(2*1)+(1*6)=154
154 % 10 = 4
So 67628-16-4 is a valid CAS Registry Number.

67628-16-4Relevant articles and documents

Umpolung of Imines Enables Catalytic Asymmetric Regio-reversed [3+2] Cycloadditions of Iminoesters with Nitroolefins

Feng, Bin,Lu, Liang-Qiu,Chen, Jia-Rong,Feng, Guoqiang,He, Bin-Qing,Lu, Bin,Xiao, Wen-Jing

supporting information, p. 5888 - 5892 (2018/05/14)

A copper-catalyzed regio-reversed asymmetric [3+2] cycloaddition of iminoesters with nitroolefins is disclosed for the first time. This method enables the facile synthesis of polysubstituted chiral pyrrolidines bearing at least one chiral quaternary cente

X=Y-ZH Systems as Potential 1,3-Dipoles. Part 8. Pyrrolidines and Δ5-Pyrrolines (3,7-Diazabicyclooctenes) from the Reaction of Imines of α-Amino Acids and their Esters with Cyclic Dipolarophiles. Mechanism of Racemisation of α-Amino Acid

Amornraksa, Kitti,Grigg, Ronald,Gunaratne, H. Q. Nimal,Kemp, James,Sridharan, Visuvanathar

, p. 2285 - 2296 (2007/10/02)

Imines of α-amino acid esters with aromatic, heterocyclic, and aliphatic aldehydes generate azomethine ylides stereospecifically by a prototropic shift on heating in toluene.The azomethine ylides undergo cycloaddition to N-phenylmaleimide, maleic anhydrid

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