Investigations in the Retene Field. V. The Structure of 6-Acetylretene

Accuracy and Precision of Microanalytical Determination of Carbon and Hydrogen: A Statistical Study

“…Symbolically, = Lim s A -* °= An estimate of a may conveniently be written " to show that it is estimated from a sample. The most common estimate is , = sVN/(N -1) = \/xd2/(N - 1) which for practical purposes, especially when A is large, may be written a, = \/Xd2/N The calculation of the average deviation, a, has been included in what follows, because it is probably more familiar to chemists and it seems to afford a fairly close estimate of the standard deviation from the analytical results in this paper.…”

“…The production of arsenic-and lead-free lac enabled candy manufacturers to use lac coating on candies to serve a double purpose: (1) to form a protective seal, and (2) to produce a desirable glaze.…”

The Chemistry of Retene.

“…The palladium charcoal dehydrogenation, carried out by Ruzicka and Waldmann (127) at 300-330°C., gave a 71 per cent yield of fairly pure retene together with approximately 4 moles of hydrogen, 1 mole of methane, 0.75 mole of carbon dioxide, and 0.25 mole of carbon monoxide. These authors postulated the following dehydrogenation reactions as taking place simultaneously, reaction 1 taking place to a much greater extent than reaction 2: C19H29COOH -* CisHis + CH4 + C02 + 4H2 (1) C19H29COOH -C18H18 + CH4 + CO + H20 + 3H2 (2) III. PRODUCTION OF RETENE FROM NATURAL SOURCES Two of the processes mentioned above have been adapted to large-scale production and have been patented.…”

“…(corrected), by the oxidation of acetylretene by sodium hypobromite. The structure of this retenecarboxylic acid was established by Adelson and Bogert (1), who determined the position of the acetyl group in acetylretene as Ce (see below). These authors (1) also simplified the synthesis of retene-6-carboxylic acid from 6-acetylretene by the use of an alkaline iodine-potassium iodide solution as the oxidant.…”

“…The Beckmann rearrangement of a ketoxime has been applied very recently and independently by several investigators to the preparation of phenanthryl amines (1,12,112). As in acetophenone, the terminal group of 6-acetylretene was very reactive and condensed smoothly with various aldehydes to chalcone types, some of which possessed tinctorial properties (32).…”