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15642-75-8

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15642-75-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 15642-75-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,6,4 and 2 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 15642-75:
(7*1)+(6*5)+(5*6)+(4*4)+(3*2)+(2*7)+(1*5)=108
108 % 10 = 8
So 15642-75-8 is a valid CAS Registry Number.

15642-75-8Relevant articles and documents

Organylzinc chalcogenolate promoted michael-type addition of α,β-unsaturated carbonyl compounds

Loren Nunes, Vanessa,De Oliveira, Ingryd Cristina,Soares Do Rego Barros, Olga

supporting information, p. 1525 - 1530 (2014/03/21)

We present the chemo-, regio-, and stereoselective synthesis of vinyl chalcogenide compounds promoted by organylzinc chalcogenolates. In this protocol, reductive cleavage of diorganyl dichalcogenide bonds by the Zn/NH 4OH system led to organylz

NEW SYNTHESIS OF CHALCOGENOCHROMONES

Luxen, Andre J.,Christiaens, Leon E. E.,Renson, Marcel J.

, p. 81 - 86 (2007/10/02)

We describe a new synthesis of chalcogenochromones and of some of their oxygen, sulfur, selenium and tellurium derivatives.The synthesis involves acidic cyclisation of (o-alkylchalcogenophenyl) ethynyl ketones.

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