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862201-37-4

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862201-37-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 862201-37-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,6,2,2,0 and 1 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 862201-37:
(8*8)+(7*6)+(6*2)+(5*2)+(4*0)+(3*1)+(2*3)+(1*7)=144
144 % 10 = 4
So 862201-37-4 is a valid CAS Registry Number.

862201-37-4Downstream Products

862201-37-4Relevant articles and documents

A modular synthesis of unsymmetrical tetraarylazadipyrromethenes

Hall, Michael J.,McDonnell, Shane O.,Killoran, John,O'Shea, Donal F.

, p. 5571 - 5578 (2007/10/03)

A stepwise route to unsymmetrical tetraarylazadipyrromethenes by a condensation of 2,4-diaryl-5-nitroso-pyrroles with 2,4-diarylpyrroles is described. This modular building-block approach allows for the introduction of up to four different aryl substituents on the azadipyrromethene and is tolerant of a varied substituent set. An efficient synthesis of the 2,4-diarylpyrroles building blocks from 1,3-diaryl-4-nitro-butan-1-ones by nitro hydrolysis to a keto-aldehyde and subsequent ammonia condensation reaction has been achieved. The facile conversion of 2,4-diarylpyrroles into their α-nitroso analogues by their reaction with sodium nitrite generated the second building block required for the synthesis.

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