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75704-08-4

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75704-08-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75704-08-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,7,0 and 4 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 75704-08:
(7*7)+(6*5)+(5*7)+(4*0)+(3*4)+(2*0)+(1*8)=134
134 % 10 = 4
So 75704-08-4 is a valid CAS Registry Number.

75704-08-4Relevant articles and documents

Fluoroalkyl Thieno- and Benzo-fused γ-Lactones

Reinecke, Manfred G.,Chen, Lao-Jer

, p. 318 - 322 (2007/10/02)

The four aryl-fused perfluoroalkyl γ-lactones 6-9 have been prepared by the directed ortho-lithiation of the N,N-diethylamide 10 and the oxazolines 15 and 20 followed by reaction with either pentafluoroacetone or hexafluoroacetone.The two thiophene lactones 6 and 7 gave their corresponding hydroxy acids 18 and 14, while the benzene lactone 8 lost the elements of CF2 on saponification to give a new γ-lactone 24 and its corresponding hydroxy acid 25.This acid closed spontaneously to 24 as did, even more rapidly, the hydroxy acid 28 of lactone 9.

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