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1228543-08-5

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1228543-08-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1228543-08-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,8,5,4 and 3 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1228543-08:
(9*1)+(8*2)+(7*2)+(6*8)+(5*5)+(4*4)+(3*3)+(2*0)+(1*8)=145
145 % 10 = 5
So 1228543-08-5 is a valid CAS Registry Number.

1228543-08-5Relevant articles and documents

Triclorosilane-mediated stereoselective synthesis of β-amino esters and their conversion to highly enantiomerically enriched β-lactams

Guizzetti, Stefania,Benaglia, Maurizio,Bonsignore, Martina,Raimondi, Laura

, p. 739 - 743 (2011/04/22)

A highly stereoselective trichlorosilane-mediated reduction of N-benzyl enamines was developed; the combination of a low cost, easy to make metal-free catalyst and an inexpensive chiral auxiliary allowed to perform the reaction on substrates with different structural features often with total control of the stereoselectivity. By easy deprotection through hydrogenolysis followed by conversion of β-aminoester to 2-azetidinones, the synthesis of enantiomerically pure β-lactams (>98% e.e.) was successfully accomplished.

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