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156049-42-2

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156049-42-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156049-42-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,0,4 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 156049-42:
(8*1)+(7*5)+(6*6)+(5*0)+(4*4)+(3*9)+(2*4)+(1*2)=132
132 % 10 = 2
So 156049-42-2 is a valid CAS Registry Number.

156049-42-2Relevant articles and documents

A novel protocol for construction of indolylmethyl group at aldehydes or ketones

Tokuyama,Watanabe,Hayashi,Kurokawa,Peng,Fukuyama

, p. 1403 - 1406 (2007/10/03)

A new method for introduction of indolylmethyl group to aldehydes or ketones using diethyl (o-isocyanophenylmethyl) phosphonate through Horner-Wadsworth-Emmons condensation, thiolmediated radical cyclization, and the subsequent desulfurization is described. The Horner-Wadsworth-Emmons reagent was prepared from 2-nitrobenzaldehyde in a concise three-step sequence.

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