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173142-22-8

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173142-22-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173142-22-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,1,4 and 2 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 173142-22:
(8*1)+(7*7)+(6*3)+(5*1)+(4*4)+(3*2)+(2*2)+(1*2)=108
108 % 10 = 8
So 173142-22-8 is a valid CAS Registry Number.

173142-22-8Downstream Products

173142-22-8Relevant articles and documents

A novel synthesis of tricyclo[5.1.0.03,5]octane-2,6-dione derivatives via double Michael addition-induced cyclopropanation reactions

Tsuboi, Sadao,Ye, Xuan,Kunito, Katsushi,Ono, Takashige

, p. 3035 - 3044 (2007/10/03)

Tricyclo[5.1.0.03,5]octane-2,6-diones 1a-q were prepared in moderate yields by the reaction of α,β-unsaturated esters 2 with dihalomethane in the presence of butyllithium, and by the reaction of dichloromethyl α,β-unsaturated ketones 3 with sodium ethoxide, respectively. This reaction was newly explained by a mechanism involving intermolecular double Michael additions of enolate anion 4 of ketones 3 and the following cyclopropanation.

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