Heptaphenyl-borepin

Fluorescent, greenish yellow heptaphenyl borepin (22) reportedly formed a colorless complex with pyridine that dissociated in warm toluene solution. Mercurideborination of (22) and treatment of the crude organomercury product with -butyllithium, followed by hydrolysis (Equation (9)), afforded hexaphenyldihydrobenzenes (23) and (24), along with some hexaphenylbenzene <75JA4436>. 

UV spectrum, 4, 1031 Borazaroselenolopyridines synthesis, 4, 1036 Borepin, 4,5-dihydro-synthesis, 1, 660 Borepin, 4,5-dihydro-l-phenyl- H NMR, 1, 635 Borepin, heptaphenyl-synthesis, 1, 638, 660 Borepin, 1-methyl-semi-empirical calculations, 1, 633 synthesis, 1, 661 IH-Borepin, 1-methyl- H NMR, 1, 635... 

The first generation of the borepin nucleus without annulated substituents occurred during the heating of colorless heptaphenyl-7-borabi-cyclo[2.2.1]heptadiene (46a) into refluxing toluene.103 104 The appearance... 

Borepin is the heterocyclic analogue of the tropyl-ium cation with a jr-electron sextet. Few borepin derivatives have been reported a monocyclic 1-meth-ylborepin 202,245 benzo derivatives 204,246 and a dithienoborepin 205247 (Scheme 77). Heptaphenyl-... 

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