Hydrogen iodide → HCID 86106951, compound

Participants

Reaction Steps

12 gm. of phosphorus diiodide (P2I4) were added in small portions to a suspension, heated on a steam bath, of 3.8 gm. (0.01) 2,6-dichloro-4,8-dianilino pyrimido-pyrimidine in 40 cc. hydrogen iodide (d=1.7) in the course of about half an hour. Heating was continued for one hour. The mixture was then cooled and the precipitated crystals were filtered off on a vacuum filter. The precipitate was extracted with 200 cc. of hot dioxane. 2.8 gm. of red, brilliant rhombic crystals remained after extraction. The yield was about 90% of the theoretical yield. The crystals were twice recrystallized from dimethyl formamide, whereby very slightly yellowish, small needles having a melting point of 255-256° C. were obtained.

Provenance & Evidence