Preparation and Characterization of Cyanovinyl-Substituted 2-Aminothiophenes and 2-Aminothiazoles and Some of Their Heterooligomers

Synthesis of tricyanovinyl-substituted thienylpyrroles and characterization of the solvatochromic, electrochemical and non-linear optical properties

“…Such dyes have found applications in manufacturing new materials capable of generating special electrooptical effects, such as frequency doubling or wave mixing. [20][21][22][23][24]30 Therefore, tricyanovinyl-derivatives 1 represent promising candidates for NLO and other applications. As part of our continuing interest in non-linear optical material [13][14][15][16][31][32] we have synthesized new tricyanovinyl-substituted thienylpyrroles 1, by tricyanovinylation reaction of thienylpyrroles 2 described by us recently.…”

Herstellung und spektrale Charakterisierung neuartiger heteroanaloger Kristallviolett-Farbstoffe

“…Erforderlich dazu sind jedoch geeignete heterocyclische Analoga vom Typ der Ketone 4 . Solche Verbindungen sind bisher unbekannt, sie lassen sich aber recht einfach nach einem kürzlich von uns beschriebenen Weg16 zur Herstellung von in 5‐Stellung acceptorsubstituierten 2‐Aminothiophenen und 2‐Aminothiazolen erhalten, indem die für die Synthese dieser Verbindungen dienenden N,N′‐persubstituierten Thioacrylamide 8 17 bzw. ihre azaanalogen Verbindungen 9 18 mit 1,3‐Dichloraceton 10 in Gegenwart einer geeigneten Hilfsbase umgesetzt werden.…”

Synthesis and Spectral Characterization of a New Class of Heterocyclic Analogues of Crystal Violet Dyes

“…With both these methods further heterocyclic analogues of Crystal Violet can be prepared as long as suitable heterocyclic analogues of 4 are available. Such compounds are unknown at yet, but can be synthesized according to a method for the synthesis of 2‐aminothiophenes and 2‐aminothiazoles that are acceptor‐substituted in the 5 position, recently described by us 16. This synthesis starts from N,N′‐persubstituted thioacrylamides 8 17 or their aza analogues 9 18 which are allowed to react with 1,3‐dichloroacetone ( 10 ) in the presence of a suitable auxiliary base.…”