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p-nitrobenzyl isopenam-3-endo-carboxylate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

76641-21-9

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76641-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 76641-21-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,6,4 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 76641-21:
(7*7)+(6*6)+(5*6)+(4*4)+(3*1)+(2*2)+(1*1)=139
139 % 10 = 9
So 76641-21-9 is a valid CAS Registry Number.

76641-21-9Relevant academic research and scientific papers

Total Synthesis of Analogues of the &β-Lactam Antibiotics. Part 2. Isopenam-3-carboxylates and their 2,2-Dioxides

Crackett, Peter H.,Pant, Chandra M.,Stoodley, Richard J.

, p. 2785 - 2793 (2007/10/02)

t-Butyl hydroxy-(2-iodomethyl-4-oxoazetidin-1-yl)acetate (10a), as a 1:1 mixture of diastereoisomers, was transformed, by sequential reactions involving thionyl chloride - 2,6-lutidine and hydrogen sulphide - triethylamine, into a 1:1.7 mixture of t-butyl

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