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83948-48-5

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83948-48-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83948-48-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,9,4 and 8 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 83948-48:
(7*8)+(6*3)+(5*9)+(4*4)+(3*8)+(2*4)+(1*8)=175
175 % 10 = 5
So 83948-48-5 is a valid CAS Registry Number.

83948-48-5Downstream Products

83948-48-5Relevant articles and documents

N-Trimethylsilyl Imines: Applications to the Synthesis of β-Lactams

Ha, Deok-Chan,Hart, David J.,Yang, Teng-Kuei

, p. 4819 - 4825 (2007/10/02)

Ester enolates and N-trimethylsilyl imines react to afford N-protio-β-lactams.The stereochemical course of the reaction depends on the ester enolate geometry.Therefore (E)-enolates give mainly cis β-lactams while (Z)-enolates give nearly equal mixtures of cis and trans β-lactams.The use of ethyl β-hydroxybutyrate as the ester component allows the preparation of β-lactams of potential use in carbapenem synthesis.The differences in the behavior of N-trimethylsilyl and N-aryl imines in ester-imine condensations are also discussed.

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