P-ligand-free, microwave-assisted variation of the Hirao reaction under solvent-free conditions; the P–C coupling reaction of >P(O)H species and bromoarenes

Under microwave conditions, the P–C coupling of aryl bromides and >P(O)H species, such as dialkyl phosphites, alkyl aryl-H-phosphinates, or diphenylphosphine oxide takes place in the presence of Pd(OAc)2 as the catalyst and triethylamine as the base without using any P-ligand or solvent. The method described is green and is of more general value