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499140-12-4

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499140-12-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 499140-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,9,9,1,4 and 0 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 499140-12:
(8*4)+(7*9)+(6*9)+(5*1)+(4*4)+(3*0)+(2*1)+(1*2)=174
174 % 10 = 4
So 499140-12-4 is a valid CAS Registry Number.

499140-12-4Relevant articles and documents

A General and Expeditious One-Pot Synthesis of Sulfoxides in High Optical Purity from Norephedrine-Derived Sulfamidites

Ruano, Jose L. Garcia,Alemparte, Carlos,Aranda, M. Teresa,Zarzuelo, Maria M.

, p. 75 - 78 (2003)

A general and simple procedure for preparing any kind of enantiomerically enriched sulfoxide starting from norephedrine-derived N-benzyloxycarbonylsulfamidite 3a is reported. After one-pot reaction of 3a with RMgX, HBF4, and R'MgX, a variety of sulfoxides 6 are obtained in ee usually higher than 93% and isolated yields ranging between 50 and 78%. The obtained configuration is tunable by simply electing the order of the addition of the reagents.

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