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195609-20-2

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195609-20-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 195609-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,5,6,0 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 195609-20:
(8*1)+(7*9)+(6*5)+(5*6)+(4*0)+(3*9)+(2*2)+(1*0)=162
162 % 10 = 2
So 195609-20-2 is a valid CAS Registry Number.

195609-20-2Relevant articles and documents

(±)-1,2-dialkyl-5-nitro-2,3-dihydro-1H-indoles by a tandem reductive amination-SNAr reaction

Bunce, Richard A.,Nago, Takahiro,White, Brian

experimental part, p. 629 - 634 (2009/11/30)

(Chemical Equation Presented) A tandem reductive amination-SNAr reaction has been applied to the synthesis of (±)-1,2-dialkyl-5-nitro-2, 3-dihydro-1H-indoles. Treatment of a series of 2-fluoro-5-nitrobenzyl ketones with primary amines and sodium cyanoborohydride in methanol at room temperature provided good yields of the target heterocycles. The reaction is sensitive to steric hindrance and proceeds best with less hindered ketone substrates using primary amines that are unbranched at the α carbon.

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