Phthalic Anhydride → HCID 10956766, compound

Participants

Reaction Steps

Following the procedure of Examples 1 or 2,7-Isopropyl-8,8-dimethyl-8,9-dihydro-7H-6,10-dioxabenzocyclononene-5,11-dione was prepared from a solution of 14.81 g (0.1 mole) of phthalic anhydride and 16.30 g (0.11 mole) of 2,2,4-trimethyl-1,3-pentanediol (TMPD) in 75 mL of xylene. The catalyst was 49.4 mg of FASCAT® 4100 catalyst. Xylene was removed on a rotary evaporator and the residue distilled to give 11.09 g of distillate, b0.5 130-160° C. which was found by vapor phase chromatography (vpc) to consist of 84% of 7-Isopropyl-8,8-dimethyl-8,9-dihydro-7H-6,10-dioxabenzocyclononene-5,11-dione (40% yield). The residue from this distillation weighed 17.65 g.

Provenance & Evidence