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162777-19-7

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162777-19-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 162777-19-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,2,7,7 and 7 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 162777-19:
(8*1)+(7*6)+(6*2)+(5*7)+(4*7)+(3*7)+(2*1)+(1*9)=157
157 % 10 = 7
So 162777-19-7 is a valid CAS Registry Number.

162777-19-7Relevant articles and documents

A New and Convenient Preparation of Conjugated Dienals

Yahata, Nobuhiro,Fujita, Makoto,Ogura, Katsuyuki

, p. 3601 - 3605 (2007/10/02)

For preparation of 5-monosubstituted or 5,5-disubstituted 2,4-dienals, 1-(methylthio)-5-(p-tolylsulfonyl)-1,3-pentadiene (4) is revealed to be an important precursor.When 5-(methylthio)-5-(p-tolylsulfonyl)-1,3-pentadiene, that is easily obtainable from (methylthio)methyl p-tolyl sulfone, was treated with silica gel, 1,5-rearrangement of p-tolylsulfonyl group occurred to give 4.The conditions for mono- or dialkylation of 4 followed by hydrolysis leading to the dienals are desribed.

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