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32164-54-8

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32164-54-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 32164-54-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,1,6 and 4 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 32164-54:
(7*3)+(6*2)+(5*1)+(4*6)+(3*4)+(2*5)+(1*4)=88
88 % 10 = 8
So 32164-54-8 is a valid CAS Registry Number.

32164-54-8Relevant articles and documents

E-Ring extended estrone derivatives: introduction of 2-phenylcyclopentenone to the estrone D-ring via an intermolecular Pauson-Khand reaction

Kaasalainen, Emmi,Tois, Jan,Russo, Luca,Rissanen, Kari,Helaja, Juho

, p. 5669 - 5672 (2007/10/03)

An expedient synthetic route to E-ring extended estrone derivatives is reported. Estrone-derived cyclopentenones were accessed by an intermolecular Pauson-Khand (PK) cycloaddition. It was found that electron donating and withdrawing substituents in the arylalkyne increased and decreased the yields of PK products, respectively. The stereochemistry of the products was elucidated by X-ray and NMR studies.

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