Reaction of Secondary Phosphines with Elemental Sulfur and Hydrazine:Atom-Economic Synthesis of Dithiophosphinates

摘要

Here we for the first time report on the three-component reaction of the secondary phosphines with elemental sulfur and hydrazine. By the example of the readily available [1-2] secondary phosphines Ia-Id it was shown that heating of the reagents (molar ratio R2PH : S : N2H4 = 1 : 2 : 1.1) at 70-75°C for 20 min in ethanol led to hydrazinium dithiophosphinates Ila-IId in 84-92% yield.