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74157-87-2

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74157-87-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74157-87-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,5 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 74157-87:
(7*7)+(6*4)+(5*1)+(4*5)+(3*7)+(2*8)+(1*7)=142
142 % 10 = 2
So 74157-87-2 is a valid CAS Registry Number.

74157-87-2Relevant articles and documents

The Diels-Alder cyclization of ketenimines

Erb, Jeremy,Strull, Jessica,Miller, David,He, Jean,Lectka, Thomas

supporting information; experimental part, p. 2191 - 2193 (2012/07/27)

A Diels-Alder reaction between cyclopentadiene and a variety of ketenimines is reported. A copper(I)-bis(phosphine complex catalyzes the cycloaddition across the C - N bond of the ketenimine in a [4 + 2] reaction to give an enamine intermediate that is hy

Facile synthesis of bicyclic amidines and imidazolines from 1,2-diamines

Zhu, Qiang,Lu, Yixin

scheme or table, p. 4156 - 4159 (2010/11/05)

A facile synthesis of chiral bicyclic amidines and imidazolines from readily available 1,2-diamines has been developed. The reported synthetic strategy relies on an intramolecular cyclization which involves a carboxylic amide derived imidoyl chloride as a

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