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161804-81-5

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161804-81-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 161804-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,8,0 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 161804-81:
(8*1)+(7*6)+(6*1)+(5*8)+(4*0)+(3*4)+(2*8)+(1*1)=125
125 % 10 = 5
So 161804-81-5 is a valid CAS Registry Number.

161804-81-5Downstream Products

161804-81-5Relevant articles and documents

A FACILE SYNTHESIS OF NEW UNSYMMETRICAL AZINES BY CYCLODESULFURIZATION REACTIONS OF DITHIOESTERS WITH DIAMINES

S. M. Hassan

, p. 213 - 218 (2007/10/02)

Dithioesters 2a, b were prepared and methylated to give dimethyl thioesters 3a, b.Azines 4a-d and 5a, b were obtained in one step from 2 with primary diamines or in two steps through 3.Dithioesters 2a, b reacted with amines in ethanol to produce thiosemicarbazones 6a, b and 8a-d, while in butanol reacted with morpholine to form 7a, b. Key words: Azines, dithioester, hydrazinecarbodithioate, imidazoles, pyrimidines, thiosemicarbazones.

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