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195244-97-4

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195244-97-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 195244-97-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,5,2,4 and 4 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 195244-97:
(8*1)+(7*9)+(6*5)+(5*2)+(4*4)+(3*4)+(2*9)+(1*7)=164
164 % 10 = 4
So 195244-97-4 is a valid CAS Registry Number.

195244-97-4Downstream Products

195244-97-4Relevant articles and documents

Enantiospecific Synthesis of N-9-Phenylfluoren-9-yl-α-amino Ketones

Paleo, M. Rita,Calaza, M. Isabel,Sardina, F. Javier

, p. 6862 - 6869 (2007/10/03)

Enantiomerically pure N-(9-phenylfluoren-9-yl)-α-amino ketones were prepared in excellent yields by acylation of organolithium reagents with N-(9-phenylfluoren-9-yl)-α-amino acid-derived oxazolidinones. The method is not applicable for the acylation of Grignard reagents as they attack the methylenic carbon of the oxazolidinone to give the corresponding N-alkylated amino acids 13 in excellent yields. The resulting N-(9-phenylfluoren-9-yl)-α-amino ketones 8 could be stereoselectively reduced to the corresponding syn- or anti-β-amino alcohols depending upon the nature of the reducing agent.

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