N-Thiophosphorylated andN-Phosphorylated Iminophosphoranes [R3P=N–P(X)R′2; × = O, S] as Models for Dendrimers: Synthesis, Reactivity and Crystal Structures
Intramolecular coupling of acetylenic groups of bis(alkynyl)phosphanes and silanes mediated by benzynezirconocene: a route to new mono- and tricyclic heterocycles
silacyclobutene fused ring systems are easily prepared via a benzynezirconocene intermediate by means of thermolysis of Cp2ZrPh2 in the presence of bis(alkynyl)phosphanes or silanes. These polyunsaturated systems are the source of a variety of new mono- or tricyclic heterocycles incorporating either one or two heteroatoms.
Diacetylenic phosphanes are cleanly transformed when reacted with zirconocene into zirconacyclopentadiene phosphiranes. These new cyclic systems are the source of a variety of unsaturated phosphorus compounds like phospharadialene or alkenyl alkynyl phosphanes.
N-Thiophosphorylated andN-Phosphorylated Iminophosphoranes [R3P=N–P(X)R′2; × = O, S] as Models for Dendrimers: Synthesis, Reactivity and Crystal Structures