Phosphorous and Sulfur and the Related Elements · 1977 · 41 citations · 4 references
Natural SciencesChemistryInorganic ChemistryOrganic ChemistryOrganometallic ChemistryCoordination ChemistryHeterocycle SynthesisHeterocyclic ChemistryHeterocyclic CompoundsOrganic SynthesisAromatic HeterocyclesOrganic Phosphorus CompoundsOrganic Reaction ChemistryPyridine ChemistryPyridine Synthesis
Abstract In 1967 we synthesized the first phosphabenzene with tervalent P, coordination number 2, and a 3pπ-2pπ-P[dbnd]C-double bond: the 2,4,6-triphenylderivative.1 One of the challenging problems in synthetic organic chemistry - is it possible to replace in the benzene molecule one of the carbon atoms by a second or third row element, by Si, P, As; is it possible to synthesize - against the classical octet rule - Phospha-, Arsa- or Sila-benzenes, had been solved in principle for the element P. This first synthesis was carried out by reaction of pyrylium salts with P (CH2 OH)3 in refluxing pyridine (Fig. 1).
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