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153499-90-2

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153499-90-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 153499-90-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,3,4,9 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 153499-90:
(8*1)+(7*5)+(6*3)+(5*4)+(4*9)+(3*9)+(2*9)+(1*0)=162
162 % 10 = 2
So 153499-90-2 is a valid CAS Registry Number.

153499-90-2Relevant articles and documents

Efficient stereoselective route to β-lactams and their application to the stereoselective synthesis of a key intermediate for carbapenem antibiotic (+)-PS-5

Miyata, Okiko,Fujiwara, Yoko,Ninomiya, Ichiya,Naito, Takeaki

, p. 2167 - 2174 (2007/10/03)

A combination of a stereoselective addition of benzenethiol to α,β-unsaturated carboxylic acid derivatives and a subsequent substitution reaction of the corresponding sulfonium group with O-alkyl-hydroxamate anion has provided a new practical and stereoselective method for the construction of 3,4-disubstituted cis- and trans-β-lactams. A successful application was demonstrated by the formal asymmetric synthesis of (+)-PS-5.

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