154959-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 154959-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,4,9,5 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 154959-89:
(8*1)+(7*5)+(6*4)+(5*9)+(4*5)+(3*9)+(2*8)+(1*9)=184
184 % 10 = 4
So 154959-89-4 is a valid CAS Registry Number.
154959-89-4Relevant academic research and scientific papers
Synthesis of Benzanellated Carbacephames, I
Santer, G.,Ongania, K. H.
, p. 71 - 78 (2007/10/02)
The direct intramolecular acylation and alkylation of the phenylsulfonylmethyl-group in the β-lactames 5a and 7 are not successful.The postulated intermediate 8 of the acylating reaction could be quenched with trimethylchlorosilane as the stable silylketa
