ACTION OF SULFUR AND AMMONIA ON 1-PHENYL-2,2,6,6-TETRAMETHYLPHOSPHORINANE-4-ON (JOINT ACTION OF ELEMENTARY SULFUR AND GASEOUS AMMONIA ON KETONES .63. ACTION OF SULFUR AND AMMONIA ON CYCLIC KETONES .7.)

1-Phenyl-2,2,6,6-tetramethylphosphorinan-4-one (1) reacts with sulfur and oxygen to the corresponding P-sulfide and until now unknown P-oxide respectively. Although both the compounds react as a ketone, the simultaneous reaction with sulfur and ammonia will not give the corresponding Δ3-thiazolines. Δ3-thiazolines are formed on treating the bis-[1-phenyl-2,2,6,6-tetramethyl-1-oxo-phosphorinan-4-one-3-yl]-disulfide with H2S, NH3 and an oxo compound. An improved method for the synthesis of 1, new derivatives of 1, the P-sulfide and of the P-oxygen compound are described. © 1968 Springer-Verlag.