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156640-14-1

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156640-14-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156640-14-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,6,4 and 0 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 156640-14:
(8*1)+(7*5)+(6*6)+(5*6)+(4*4)+(3*0)+(2*1)+(1*4)=131
131 % 10 = 1
So 156640-14-1 is a valid CAS Registry Number.

156640-14-1Downstream Products

156640-14-1Relevant articles and documents

POTENTIAL NOOTROPIC AGENTS: SYNTHESIS OF SOME 1,4-DISUBSTITUTED 2-OXOPYRROLIDINES AND SOME RELATED COMPOUNDS

Valenta, Vladimir,Urban, Jiri,Taimr, Jan,Polivka, Zdenek

, p. 1126 - 1136 (2007/10/02)

4-(Aminomethyl)-1-benzyl-2-oxopyrrolidine (VI) was transformed by treatment with (4-benzhydrylpiperazin-1-yl)carbonyl chlorides IIIb-IIId and with (4-methylpiperazin-1-yl)carbonyl chloride (IIIa) to the carboxamides IVa-IVd.Heating of 1-(ethoxycarbonylmethyl)-2,4-dioxopyrrolodine (XIX) in acetonitrile in the presence of water afforded XVIIIa.Treatment with ammonia led to the diamide XVIIIc, while alkaline hydrolysis of XVIIIa gave the dicarboxylic acid XVIIIb. 4-(Aminomethyl)-1-(4-methylthiobenzyl)-2-oxopyrrolidine (XII) was prepared by the reaction of 4-(methylthio)benzylamine with itaconic acid and the following sequence of reaction ...

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