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199122-70-8

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199122-70-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199122-70-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,1,2 and 2 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 199122-70:
(8*1)+(7*9)+(6*9)+(5*1)+(4*2)+(3*2)+(2*7)+(1*0)=158
158 % 10 = 8
So 199122-70-8 is a valid CAS Registry Number.

199122-70-8Relevant articles and documents

Asymmetric desymmetrization of saturated and unsaturated meso-1,2-diols

Fujioka, Hiromichi,Nagatomi, Yasushi,Kotoku, Naoyuki,Kitagawa, Hidetoshi,Kita, Yasuyuki

, p. 10141 - 10151 (2007/10/03)

An asymmetric desymmetrization of saturated and unsaturated cyclic and acyclic meso-1,2-diols has been developed from the ene acetals, prepared from the norbornene carboxyaldehyde and meso-1,2-diols. The intramolecular haloetherification of the ene acetals as a key step afforded 8-membered acetals in a stereoselective manner just by the reaction of norbornene olefin even when the ene acetals from unsaturated meso-1,2-diols having olefins in the same molecule were used. Subsequent reductive elimination, followed by protecting the hydroxy group and transacetalization, gave optically active 1,2-diol derivatives and the starting ene acetals in good yields. (C) 2000 Elsevier Science Ltd.

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