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289680-83-7

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289680-83-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 289680-83-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,9,6,8 and 0 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 289680-83:
(8*2)+(7*8)+(6*9)+(5*6)+(4*8)+(3*0)+(2*8)+(1*3)=207
207 % 10 = 7
So 289680-83-7 is a valid CAS Registry Number.

289680-83-7Relevant articles and documents

Reaction of 1-chlorovinyl p-tolyl sulfoxides with carbanion of acetonitrile: A novel synthesis of cyclopentanone derivatives with three consecutive carbon-carbon bond-formations via the enaminonitriles

Satoh, Tsuyoshi,Ota, Hiroyuki

, p. 5113 - 5122 (2007/10/03)

Treatment of 1-chlorovinyl p-tolyl sulfoxides derived from ketones with cyanomethyllithium gave cyclopentadienyl enaminonitriles in high yields with three consecutive carbon- carbon bond-formations. However, the 1-chlorovinyl p-tolyl sulfoxides derived from aldehydes did not give good results. The mechanism of this reaction and the reaction of the enaminonitriles to convert cyclopentanone derivatives were investigated. Several α-carbanion of nitriles other than acetonitrile added to the 1-chlorovinyl p-tolyl sulfoxides at low temperature in good yield; however, they did not cyclize upon warming to room temperature. (C) 2000 Elsevier Science Ltd.

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