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649552-54-5

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649552-54-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 649552-54-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,9,5,5 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 649552-54:
(8*6)+(7*4)+(6*9)+(5*5)+(4*5)+(3*2)+(2*5)+(1*4)=195
195 % 10 = 5
So 649552-54-5 is a valid CAS Registry Number.

649552-54-5Relevant articles and documents

Direct Asymmetric Synthesis of β-Amino Ketones from Sulfinimines (N-Sulfinylimines). Synthesis of (-)-Indolizidine 209B

Davis, Franklin A.,Yang, Bin

, p. 5011 - 5014 (2003)

(Equation presented) N-Sulfinyl β-amino ketones, prepared directly from the potassium enolates of methyl ketones and enantiopure sulfinimines, are transformed in one pot to protected amino ketones, which are valuable chiral building blocks for the assembl

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