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Photoisomerization of a Mesoionic 4,6-Dioxo-1,3-diazine in Langmuir Films

✍ Scribed by Fulda, Karl-Ulrich; Maassen, Ellen; Ritter, Helmut; Sperber, Rolf; Tieke, Bernd


Book ID
126302479
Publisher
American Chemical Society
Year
1996
Tongue
English
Weight
186 KB
Volume
12
Category
Article
ISSN
0743-7463

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## Abstract Mesoionic 5‐alkyl‐4,6‐dioxo‐1,3‐diphenyl‐2‐(3‐vinylbenzylthio)‐1,3‐diazine (6) was prepared by condensation of alkylmalonic acid (5) with 1,3‐diphenyl‐2‐(3‐vinylbenzyl)isothiourea (4) by use of dicyclohexylcarbodiimide (DCC). Homopolymerization of 6 led to new polystyrene derivatives (7

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## Abstract Mesoionic 5‐methyl‐4,6‐dioxo‐3‐phenyl‐1‐(4‐vinylphenyl)‐1,3‐diazine (5) was obtained by condensation of 3‐phenyl‐1‐(4‐vinylphenyl)formamidine (3) with methylmalonic acid (4). This vinyl‐substituted mesoionic heterocyclic compound was polymerized by usual radical initiation and, addition

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## Abstract The reaction of the 6‐chloro‐2‐(1‐methyl‐2‐thiocarbamoylhydrazino)quinoxaline 4‐oxides 3a‐d with trifluoroacetic anhydride gave the 2‐(__N__‐aryl)trifluoroacetamido‐8‐chloro‐4‐methyl‐4__H__‐1,3,4‐thiadiazino‐[5,6‐__b__]quinoxalines 7a‐d, respectively, while the reflux of compounds 3a‐c