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67220-90-0

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67220-90-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67220-90-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,2,2 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 67220-90:
(7*6)+(6*7)+(5*2)+(4*2)+(3*0)+(2*9)+(1*0)=120
120 % 10 = 0
So 67220-90-0 is a valid CAS Registry Number.

67220-90-0Downstream Products

67220-90-0Relevant articles and documents

Cyclopentenone Synthesis from 1,1-Dichloroallyllithium-Ketone Adducts as Well as from Dichlorocarbene-Allyl Alcohol Adducts

Hiyama, Tamejiro,Shinoda, Masaki,Tsukanaka, Masao,Nozaki, Hitosi

, p. 1010 - 1014 (2007/10/02)

Treatment of (3,3-dialkyl-2,2-dichlorocyclopropyl)methanols with hydrobromic acid gives 2-cyclopentenones through postulated intermediates, 3-chlorocyclopentadienyl cations.Another method which should give the same cationic intermediates involves trifluoroacetic acid catalyzed reaction of 3,3-dichloro-1-alken-4-ols.This is found to be particularly useful for cyclopentenone annulation.

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