Water → HCID 17846597, compound

Participants

Reaction Steps

A suspension of 40.0 g (90.0 mmol) of di-(2,2,6,6-tetramethylpiperidin-4-yl) terephthalate, 2.0 g of molybdenum trioxide, and 250 ml of ethylbenzene is heated to 110° C. t-Butyl hydroperoxide (70%, 69.5 g, 540 mmol) is rapidly added. No reaction is visible until water is removed by azeotropic distillation and the internal temperature reaches 115° C. Heating is continued for 6 hours. The nearly colorless reaction mixture is allowed to cool, then filtered and evaporated to yield a pink solid. The solid is recrystallized (9:1 2-propanol:methylene chloride) to yield 48.4 g of the title compound, a white solid, m.p. 150°-152° C. A second crop of 5.3 g is obtained from the mother liquor. Total yield 53.7 g (87% yield).

Provenance & Evidence