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219940-21-3

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219940-21-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219940-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,4 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 219940-21:
(8*2)+(7*1)+(6*9)+(5*9)+(4*4)+(3*0)+(2*2)+(1*1)=143
143 % 10 = 3
So 219940-21-3 is a valid CAS Registry Number.

219940-21-3Downstream Products

219940-21-3Relevant articles and documents

P-Chiral Monophosphorus Ligands for Asymmetric Copper-Catalyzed Allylic Alkylation

Xiong, Wenrui,Xu, Guangqing,Yu, Xinhong,Tang, Wenjun

, p. 4003 - 4013 (2019/06/24)

Asymmetric copper-catalyzed allylic alkylation between allyl bromides and alkyl Grignard reagents using a P-chiral monophosphorus ligand is described. A range of terminal olefins bearing tertiary or quaternary carbon centers were formed in good branched/linear selectivities and excellent enantioselectivities at copper loadings as low as 0.5 mol %.

Synthesis of unusual bicyclic nucleosides bearing an unsaturated side-chain, as potential inhibitors of varicella-zoster virus (VZV)

Bidet,McGuigan,Andrei,Snoeck,De Clercq,Balzarini

, p. 817 - 819 (2007/10/03)

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