ChemInform Abstract: SYNTHESIS AND SOME PROPERTIES OF 1,2,3,4‐TETRAHYDRO‐1,2,4,5‐TETRAAZA‐3‐PHOSPHORINS

Abstract

Die Di‐a‐methylhydrazide (I) reagieren mit Orthoestern (II) zu Tctraaza‐phosphorinen (III).

Synthesis and EPR Characterization of “Phosphaverdazyl” Radicals

“…The two phosphaverdazyl radicals were prepared as shown in eqs 1 and 2. The 1,2,4,5,6-tetrazaphosphorine 4 was prepared using a modified form of a procedure reported by Markovskii et al Thus, the bis(1-methyl hydrazide) of phenylphosphonic acid was reacted with trimethyl orthobenzoate to give the 1,2,4,5-tetraza-6-phosphorine 4 in 50 % yield (Equation 1) . Using a similar methodology, the reaction of the bis(1-methylhydrazide) of carbonic acid with trichlorodiphenylphosphorane in the presence of triethylamine produced the 1,2,4,5-tetraza-3-phosphorine 6 in 42% yield (Equation 2).…”