53323-72-1Relevant articles and documents
Formation of phosphorus heterocycles using a cationic electrophilic phosphinidene complex
Vaheesar, Kandasamy,Kuntz, Colin M.,Sterenberg, Brian T.
, p. 347 - 355 (2013)
The electrophilic terminal aminophosphinidene complex [CpFe(CO) 2P{N-i-Pr2}][X] (Cp = cyclopentadienyl, i-Pr = isopropyl, X = AlCl4 or NaBPh4), generated from [CpFe(CO) 2{P(Cl)N-i-Pr2}] by chloride abstraction, reacts with alkynes and alkenes via (1 + 2) cycloaddition to form phosphirenes and phosphiranes respectively. Conjugated alkenes react with [CpFe(CO) 2P{N-i-Pr2}]+ to form phosphirane intermediates, which then rearrange to 3-phospholenes. The phosphinidene complex reacts with benzylideneacetone to give an oxo-3-phospholene complex. Azobenzene reacts with [CpFe(CO)2P{N-i-Pr2}]+ to form a benzodiazophosphole via C-H activation. Addition of HCl or HBF 4·Et2O to the iron diphenylphosphirene complex and iron benzodiazophosphole complex results in P-N bond cleavage, yielding the respective chlorophosphorus heterocyclic complexes. The heterocycles can be removed from the metal complexes to make metal free phosphorus heterocycles by addition of trimethyl- or triethylphosphine.