Van Allan, James A. et al. published their research in Journal of the American Chemical Society in 1947 | CAS: 19311-91-2

N,N-Diethylsalicylamide (cas: 19311-91-2) belongs to amides. Compared to amines, amides are very weak bases and do not have clearly defined acid–base properties in water. On the other hand, amides are much stronger bases than esters, aldehydes, and ketones. The presence of the amide group –C(=O)N– is generally easily established, at least in small molecules. It can be distinguished from nitro and cyano groups in IR spectra. Amides exhibit a moderately intense νCO band near 1650 cm−1. By 1H NMR spectroscopy, CONHR signals occur at low fields. In X-ray crystallography, the C(=O)N center together with the three immediately adjacent atoms characteristically define a plane.Formula: C11H15NO2

Salol reaction was written by Van Allan, James A.. And the article was included in Journal of the American Chemical Society in 1947.Formula: C11H15NO2 This article mentions the following:

The salol procedure is very convenient for the preparation of amides of o-HOC6H4CO2H, particularly from the H2NC6H4OH. o-H2NC6H4OH or o-diamines give a cyclic compound The following were prepared from o-HOC6H4CO2Ph (name of amine used, formula of resulting derivative of o-HOC6H4CO2H, m.p. (or b.p.), and yield are given): piperidine, C12H15O2N, m. 142-3°, 69%; cyclohexylamine, C13H17O2N, m. 85-6°, 79%; PhCH2NH2, C14H13O2N, m. 135-6°, 77%; dodecylamine, C19H31O2N, m. 71-2°, 75%; Et2NH, C11H15O2N, b4 146-8°, 68%; (CH2NH2)2, C16H16O4N2, m. 183-4°, 69%; ClC6H4NH2 (isomer not given), C13H11ONCl, m. 155°, 83%; H2NC6H4Ph (isomer not given), C19H15O2N, m. 110°, 85%; o-H2NC6H4OH, C13H9O2N, m. 125°, 22.4%; m-isomer, C13H11O2N, m. 184° 58%; 5-aminoindazole, C14H11O2N3, m. 230°, 37%; 6-isomer, m. 234-5°, 31%; 5-aminobenzotriazole, C13H10O3N4, m. 245°, 42%; 1,2,3,4-tetrahydroquinoline, C16H15O2N, m. 138-9°, 34%. Compounds from 1,2-HOC10H6CO2Ph:Et2NH, C15H17O2N, b1 130-3°, 63%; o-C6H4(NH2)2, C17H12ON2, m. above 265°, 78%; o-H2NC6H4OH, C17H11O2N, m. 188°, 89%. In the experiment, the researchers used many compounds, for example, N,N-Diethylsalicylamide (cas: 19311-91-2Formula: C11H15NO2).

N,N-Diethylsalicylamide (cas: 19311-91-2) belongs to amides. Compared to amines, amides are very weak bases and do not have clearly defined acid–base properties in water. On the other hand, amides are much stronger bases than esters, aldehydes, and ketones. The presence of the amide group –C(=O)N– is generally easily established, at least in small molecules. It can be distinguished from nitro and cyano groups in IR spectra. Amides exhibit a moderately intense νCO band near 1650 cm−1. By 1H NMR spectroscopy, CONHR signals occur at low fields. In X-ray crystallography, the C(=O)N center together with the three immediately adjacent atoms characteristically define a plane.Formula: C11H15NO2

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics