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1643770-99-3

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1643770-99-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1643770-99-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,7,7 and 0 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1643770-99:
(9*1)+(8*6)+(7*4)+(6*3)+(5*7)+(4*7)+(3*0)+(2*9)+(1*9)=193
193 % 10 = 3
So 1643770-99-3 is a valid CAS Registry Number.

1643770-99-3Relevant articles and documents

Stereoelectronic basis for the kinetic resolution of n-heterocycles with chiral acylating reagents

Hsieh, Sheng-Ying,Wanner, Benedikt,Wheeler, Philip,Beauchemin, Andre M.,Rovis, Tomislav,Bode, Jeffrey W.

, p. 7228 - 7231 (2014/06/23)

The kinetic resolution of N-heterocycles with chiral acylating agents reveals a previously unrecognized stereoelectronic effect in amine acylation. Combined with a new achiral hydroxamate, this effect makes possible the resolution of various N-heterocycles by using easily prepared reagents. A transition-state model to rationalize the stereochemical outcome of this kinetic resolution is also proposed.

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