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133368-88-4

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133368-88-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133368-88-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,3,6 and 8 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 133368-88:
(8*1)+(7*3)+(6*3)+(5*3)+(4*6)+(3*8)+(2*8)+(1*8)=134
134 % 10 = 4
So 133368-88-4 is a valid CAS Registry Number.

133368-88-4Relevant articles and documents

Direct Substitution of Aromatic Ethers by Lithium Amides. A New Aromatic Amination Reaction

Hoeve, Wolter ten,Kruse, Chris, G.,Luteyn, Jan M.,Thiecke, Janet R. G.,Wynberg, Hans

, p. 5101 - 5106 (1993)

Reaction of lithiated dialkylamines with methoxy aromatics in refluxing THF leads to products resulting from a direct ipso-substitution.Especially with lithiated secondary amines high conversions and selectivities are achieved.Sulfonyl-substituted aromatics react equally well, but halogenated aromatics give rise to side-products arising from a competing pathway via aryne intermediates.The scope and mechanistic implications of this novel nucleophilic amination reaction are described.

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