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197219-15-1

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197219-15-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 197219-15-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,2,1 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 197219-15:
(8*1)+(7*9)+(6*7)+(5*2)+(4*1)+(3*9)+(2*1)+(1*5)=161
161 % 10 = 1
So 197219-15-1 is a valid CAS Registry Number.

197219-15-1Relevant articles and documents

Asymmetric synthesis of (-)-swainsonine, (+)-1,2-di-epi-swainsonine, and (+)-1,2,8-tri-epi-swainsonine

Lindsay, Karl B.,Pyne, Stephen G.

, p. 7774 - 7780 (2007/10/03)

The asymmetric synthesis of (-)-swainsonine via a nonchiral pool route that involves the Sharpless epoxidation to induce chirality is reported. The key steps involve vinyl epoxide aminolysis, ring-closing metathesis, and intramolecular N-alkylation to prepare the indolizidine ring and a highly diastereoselective cis-dihydroxylation using AD-mix-α. This synthetic strategy also allowed for the diastereoselective synthesis of (+)-1,2-di-epi-swainsonine and (+)-1,2,8-tri-epi-swainsonine.

The biomimetic construction of fused cyclic polyethers

Hayashi, Nobuyuki,Fujiwara, Kenshu,Murai, Akio

, p. 12425 - 12468 (2007/10/03)

The formation of fused cyclic ethers by biomimetic synthesis was demonstrated. The one-pot successive ring-expansion reactions of bromo diepoxides were investigated by regarding the epoxy groups as the nucleophiles for the intramolecular cationic carbons to obtain the fused cyclic ethers.

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