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209852-83-5

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209852-83-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 209852-83-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,8,5 and 2 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 209852-83:
(8*2)+(7*0)+(6*9)+(5*8)+(4*5)+(3*2)+(2*8)+(1*3)=155
155 % 10 = 5
So 209852-83-5 is a valid CAS Registry Number.

209852-83-5Relevant articles and documents

Chiral Allyl Cations Are Capture by Furan with 100% Stereoselectivity: Synthesis of Enantiopure 2-Alkoxy-8-oxabicyclo[3.2.1]oct-6-en-3-ones by Low-Temperature [4+3] Cycloaddition

Stark, Christian B. W.,Pierau, Sabine,Wartchow, Rudolf,Hoffmann

, p. 684 - 691 (2007/10/03)

A low-temperature (-95°C) protocol for intermolecular cycloadditions of furan to chiral silyloxyallyl cations in dichloromethane is described. Key precursors are open-chain, mixed α-ketoacetals, which are chiral. The resulting [4+3] cycloadducts are dense

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