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81477-53-4

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81477-53-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81477-53-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,4,7 and 7 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81477-53:
(7*8)+(6*1)+(5*4)+(4*7)+(3*7)+(2*5)+(1*3)=144
144 % 10 = 4
So 81477-53-4 is a valid CAS Registry Number.

81477-53-4Relevant articles and documents

Further Studies on the Synthesis of Thienamycin: a Facile and Stereoselective Synthesis of a Bicyclic β-Keto Ester by 1,3-Dipolar Cycloaddition

Kametani, Tetsuji,Huang, Shyh-Pyng,Nakayama, Atsushi,Honda, Toshio

, p. 2328 - 2331 (2007/10/02)

A potential compound, ethyl 6-*)-1-hydroxyethyl>-3,7-dioxo-1-azabicycloheptane-2-carboxylate (18), for the synthesis of thienamycin (1), was stereoselectively prepared by 1,3-dipolar cycloaddition of the nitrone (12) and benzyl crotonate as a key reaction.

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