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90696-32-5

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90696-32-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90696-32-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,6,9 and 6 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 90696-32:
(7*9)+(6*0)+(5*6)+(4*9)+(3*6)+(2*3)+(1*2)=155
155 % 10 = 5
So 90696-32-5 is a valid CAS Registry Number.

90696-32-5Downstream Products

90696-32-5Relevant 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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