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78739-68-1

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78739-68-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 78739-68-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,7,3 and 9 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 78739-68:
(7*7)+(6*8)+(5*7)+(4*3)+(3*9)+(2*6)+(1*8)=191
191 % 10 = 1
So 78739-68-1 is a valid CAS Registry Number.

78739-68-1Relevant articles and documents

The Total Synthesis of dl-Quadrone

Danishefsky, Samuel,Vaughan, Kenward,Gadwood, Robert,Tsuzuki, Kazuo

, p. 4136 - 4141 (2007/10/02)

A regio- and stereospecific total synthesis of dl-quadrone (1) is described.The synthesis, which starts with 4,4-dimethylcyclopent-2-en-1-one (5), is accomplished in 19 steps in 3.1percent yield.The key intermediates are the enone ester 4, the iodo ketal 15, the tricyclic keto ester 16, and the hydroxymethyl keto acid 22.The latter as well as the seco acid 2 afford quadrone upon thermolysis.

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