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1258546-57-4

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1258546-57-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1258546-57-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,8,5,4 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1258546-57:
(9*1)+(8*2)+(7*5)+(6*8)+(5*5)+(4*4)+(3*6)+(2*5)+(1*7)=184
184 % 10 = 4
So 1258546-57-4 is a valid CAS Registry Number.

1258546-57-4Relevant articles and documents

An improved and mild wenker synthesis of aziridines

Li, Xinyao,Chen, Ning,Xu, Jiaxi

experimental part, p. 3423 - 3428 (2010/11/21)

The conventional Wenker synthesis of aziridines from vicinal amino alcohols has been modified by employing mild reaction conditions. Amino alcohols were converted into their hydrogen sulfates with chlorosulfonic acid. The sulfates were cyclized with sodium hydroxide, and even with non-nucleophilic sodium carbonate. The current, improved method extends the scope of the typical Wenker synthesis and is applicable to unstable amino alcohols in hot sulfuric acid and to unstable sulfates which favor elimination and hydroxide displacement in the presence of strong base. Georg Thieme Verlag Stuttgart.

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