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143673-42-1

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143673-42-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143673-42-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,6,7 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 143673-42:
(8*1)+(7*4)+(6*3)+(5*6)+(4*7)+(3*3)+(2*4)+(1*2)=131
131 % 10 = 1
So 143673-42-1 is a valid CAS Registry Number.

143673-42-1Downstream Products

143673-42-1Relevant articles and documents

Synthesis of tetraketones in water and under catalyst-free conditions

Yu, Jian-Jun,Wang, Li-Min,Liu, Jin-Qian,Guo, Feng-Lou,Liu, Ying,Jiao, Ning

, p. 216 - 219 (2010)

A simple, environmentally friendly, tandem Knoevenagel condensation and Michael addition procedure is reported. The reactions between cyclic-13-diketones and a variety of aldehydes were carried out in water to afford tetraketones (64-99%). In this green synthetic protocol, the solvent water itself catalysed the reaction by hydrogen bonding, thus avoiding the use of any other catalysts to make the work up procedure easier.

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