Lawesson's reagent → HCID 57195235, compound

Participants

Reaction Steps

7-(2-Chloro-4-trifluoromethylphenoxy)-2,4-dimethyl-2H-1,4-benzoxazine-3 (4H)-one (2.5 g) prepared in Example 6 was dissolved in toluene (30 ml), and 2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide (1.9 g) was added thereto, and the resultant mixture was refluxed for 2 hr. The solvent was distilled off in vacuo, and the residue was purified by silica gel column chromatography (developing solvent: n-hexane/ethyl acetate=5/1) to prepare the title compound (2.9 g) as a colorless crystal.

Provenance & Evidence