Contribution of annelation to the thermal stability of some coloring materials was written by Matsuoka, Masaru;Ishisaka, Mikio;Kitao, Teijiro;Konishi, Kenzo. And the article was included in Nippon Kagaku Kaishi in 1972.Related Products of 20749-68-2 This article mentions the following:
Benzimidazoles, phthaloperinones, 3′-hydroxyquinophthalones, quinazolone-phthalones and their annellation derivatives were prepared by the reaction of substituted phthalic or 2,3-naphthalenedicarboxylic anhydride (I) with o-C6H4(NH2)2, 1,8-C10H6(NH2)2, 3-hydroxy-4-carboxyquinaldine, or 2-methyl-4-quinazolone. The fastness to sublimation for these compounds on polyester fiber and PVC [9002-86-2] sheet was tested. The thermal stability (thermogravimetric anal.) of the annelation derivatives prepared from I was better than that of the derivatives from phthalic anhydride. The annelation effect on color and light fastness of these coloring matters were also discussed. In the experiment, the researchers used many compounds, for example, 8,9,10,11-Tetrachloro-12H-isoindolo[2,1-a]perimidin-12-one (cas: 20749-68-2Related Products of 20749-68-2).
8,9,10,11-Tetrachloro-12H-isoindolo[2,1-a]perimidin-12-one (cas: 20749-68-2) belongs to indole derivatives. Indole could be stereoselectively alkylated with chiral cyclopentyl sulfone reagent. In addition to indole, the strain-release chemistry worked for numerous substrates including amines, alcohols, thiols, carboxylic acids, imidazoles, and pyrazoles.Related Products of 20749-68-2
Referemce:
Indole alkaloid derivatives as building blocks of natural products from聽Bacillus thuringiensis聽and聽Bacillus velezensis聽and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles