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153831-44-8

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153831-44-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 153831-44-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,3,8,3 and 1 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 153831-44:
(8*1)+(7*5)+(6*3)+(5*8)+(4*3)+(3*1)+(2*4)+(1*4)=128
128 % 10 = 8
So 153831-44-8 is a valid CAS Registry Number.

153831-44-8Relevant articles and documents

Base-catalysed nucleophilic aromatic substitution reaction: Difference in reactivity between endo- and exo-2,3-(cyclopenten-3',5'-diyl)-N-(2",4"-dinitrophenoxy)succinimides with hydroxide ion and piperidine

Bhattacharjee, Gurudas,Singh, Ashok Kumar,Saikia, Ranjumoni,Yadav, Sudha

, p. 1214 - 1217 (2007/10/02)

The reaction of 2,3-(cyclopenten-endo-3',5'-diyl)-N-(2",4"-dinitrophenoxy)succinimide (1) with hydroxide ion and piperidine in aq. acetonitrile is base-catalysed.The exo-isomer (2) reacts at a faster rate than the endo-isomer (1).The rate of the reaction in various acetonitrile-water media decreases with a decrease in water concentration for both hydroxide ion and piperidine in the case of endo-isomer and only in respect of hydroxide ion in the case of exo-isomer.The reaction rate with piperidine in the case of exo-isomer, however, increases with a decrease in the percentage of water.The mechanistic interpretation is given.

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