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80171-31-9

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80171-31-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80171-31-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,1,7 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 80171-31:
(7*8)+(6*0)+(5*1)+(4*7)+(3*1)+(2*3)+(1*1)=99
99 % 10 = 9
So 80171-31-9 is a valid CAS Registry Number.

80171-31-9Relevant articles and documents

A facile and mild approach for stereoselective synthesis of α-fluoro-α,β-unsaturated esters from α-fluoro-β-keto esters via deacylation

Qian, Jinlong,Yi, Wenbin,Lv, Meifang,Cai, Chun

supporting information, p. 127 - 132 (2015/02/02)

The highly stereoselective olefination reaction of α-fluoro-β-keto esters for the synthesis of α-fluoro-α,β-unsaturated esters has been developed. The olefination combines nucleophilic addition, intramolecular nucleophilic addition, and elimination in one step, as well as provides a facile synthetic approach to α-fluoro-α,β-unsaturated esters which are important units in many biologically active compounds and useful precursors in a variety of functional-group transformations.

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