Efficient trapping of the liberated fluoride ions is the key to the synthesis of the hexakis(onio)‐substituted benzene derivative 1 in 92% yield from hexafluorobenzene and dimethylaminopyridine. In the solid state one of the triflate counterions of 1 is located above and one below the central benzene ring to give a triple‐decker‐type structure.

Keywords: Amino alcohols / Chirality / Nitrogen heterocycles / Oxazolines / Salicylic acids New, diversely substituted phenolic oxazolines 14a−d and 15a−d were prepared by two complementary routes A and B, starting from salicylic derivatives 4−7 and various enantiomerically pure 1,2-amino alcohols 13a−d. In route A, the 1,2-amino alcohols 13a−d were directly condensed with the salicylic acids 5 and 7, using the Appel reaction, whereas in route B the amino alcohols 13b−d were treated with the 2-hydroxybenzonitriles 4 and 6, under Witte−Seeliger conditions. The latter route was advantageous for L-valinol 13b

No abstract

Pyrolysis of Compound II.-One-half gram of compound II was heated in a distilling apparatus at 270-280°( bath temperature) under normal pressure. The reaction vessel was left to cool and the substance collected was crystallized from ethyl alcohol and proved to be khellin (m.p. and m.m.p.). Yield, ca. 70%.Thermochromic Behavior in Piperidine .-Compound II dissolved in piperidine (E. Merck), produces a red-violet color at room temperature. The color discharges almost completely on heating. On cooling the red color is regenerated. The phenomenon is reversible for several times, but on standing for a long time at room temperature, the color of the solution fades considerably.Action of Alumina on II.-When compound II in benzene (thiophene-free and dried over sodium) is treated with a small amount of alumina (Aluminiumoxyd Woelm, alkalifrei, annahrend neutral, Akt. Stufe 1, M. Woelm-Eschwege), a red-violet color appears instantaneously on the surface of the inorganic material and the benzene solution remains practically colorless.

No abstract