Studies on Organophosphorus Compounds. Part 6. Utility of Lawesson′s Reagent for Synthesis of Thiaphosphorine, Thioxanthene, and Thiaphosphole Derivatives.

Studies on organophosphorus compounds XX

Studies on organophosphorus compounds XXIII synthesis of salicylthioamides and 4H-1,3,2-benzoxaphoshorine derivatives from the dimer of p-methoxyphenylthionophosphine sulfide and salicylamides

✍ S. Scheibye; B. S. Pedersen; S.-O. Lawesson 📂 Article 📅 2010 🏛 Wiley (John Wiley & Sons) ⚖ 383 KB 👁 2 views

## Abstract By heating secondary __O__‐hydroxybenzamides at 110‐120 °C with the dimer of __p__‐methoxyphenylthionophosphine sulfide, 1, in HMPA, the main product is the corresponding thioamide (15‐51 %) but in addition two phosphorheterocyclic systems are isolated, namely 2,3‐dihydro‐2‐(4‐methoxyph