Replacement of amino groups

Replacement of amino groups at 2 -position with azomethine groups gives brown color. These include 6 -diethylamino-2 -ethylidenamino-fluoran (49 R = CH3),42 2 -(2-butenylidenamino)-6 -diethylaminofluoran (49 R = CH3CH=CH),42 2 -benzylidenamino-6 -diethylaminofluoran (49 R = CsHs),42 and 2 -cinnamylidenamino-6 -diethylaminofluoran (49 R = C6H5CH=CH).42... 

Replacement of Amino Groups by Fluorine in Aromatic and Heteroaromatic Compounds... 

Although yields were not given, the method was recommended for the replacement of amino groups by hydrogen.122... 

Replacement of Amino Groups in Aromatic Amines with Fluorine via Diazonium Compounds (Aromatic Fluorodediazoniation)... 

The replacement of amino groups by fluoro, bromo, and iodo substituents has been described in Section V.IH (882, 884), Section V.IK (798-800, 807, 890-892) and Section V.ll (887), respectively and of hydrazino groups by chloro and bromo substituents in Section V.l J (851,888). 

Identification of arylaminosulfonic acids Replacement of amino groups by chlorine... 

The calculated gas phas basicities indicate that the protonation at the =NH group of guanidinophosphazene is the most favourable site in the molecule (Figure 2.13). The replacement of amino groups by the cyclic guanidino fragment (1,3-dimethylimidazohdin-... 

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