Influence of ortho substituents on the stretching frequencies of side-chain carbonyl groups in substituted benzenes was written by O’Sullivan, D. G.;Sadler, P. W.. And the article was included in Journal of the Chemical Society in 1957.Category: indole-building-block This article mentions the following:
Carbonyl frequencies for ortho-substituted benzoic acids, acetanilides, hydroxyimino acetanilides, anthranilic acids, and 4- and 7-substituted isatins are tabulated for NH2, Me, H, F, I, Br, Cl, CF3, and NO2 as substituents. The frequencies increase with para-闂?(Hammett’s) values, with acidity of the correspondingly substituted pyridinium ions, with Taft’s 闂?sup>+-values (C.A. 46, 10793f; 48, 11287e) and are well correlated among each other. In the experiment, the researchers used many compounds, for example, 7-Nitroindoline-2,3-dione (cas: 112656-95-8Category: indole-building-block).
7-Nitroindoline-2,3-dione (cas: 112656-95-8) belongs to indole derivatives. Indole produced by Proteus, Pseudomonas, Escherichia and other species was shown to be a growth promoting factor in Arabidopsis thaliana. Moreover, it is known that it controls biofilm formation. However, the role of indole in the cell has not been fully elucidated.Category: indole-building-block
Referemce:
Indole alkaloid derivatives as building blocks of natural products from闂佽壈浜崹淇沜illus thuringiensis闂佽壈浜粋鍧闂佽壈浜崹淇沜illus velezensis闂佽壈浜粋鍧 their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles