反应详情

温度

25 °C

A mixture of 5-hydroxymethyl-1,3-dioxane (3.90 g, 33 mmol), N-hydroxyphthalimide (6.46 g, 39.6 mmol) and triphenylphosphine (10.39 g, 39.6 mmol) in tetrahydrofuran (150 ml) was cooled to O° C. and stirred during the addition of diethyl azodicarboxylate (6.24 ml, 39.6 mmol). The solution was then stirred for 16 h at 25° C. and evaporated to dryness. The residue was triturated twice with ether, evaporated to dryness then chromatographed in chloroform/methanol (40:1) to give 5-phthalimidooxymethyl-1,3-dioxane (6.63 g, 76.3%) as a white solid; m.p. 98-106° C.: νmax (KBr) 1780, 1735, 1470, 1400, 1160 cm-1 ; δH (CDCl3) 2.20(1H, m, CH), 4.07(4H, m, OCH2CHCH2O), 4.37(2H, d, J6.88 Hz, CH2ON), 4.86(2H, m, OCH2O), 7.8I(4H, m, C6H4); Found: C,59.31; H, 5.03; N, 5.31%; C13H13NO5 requires: C, 59.31; H, 4.98; N, 5.32%; m/z 264(MH+, 100%).

1. temperaturewas cooled to O° C
2. customevaporated to dryness
3. customThe residue was triturated twice with ether
4. customevaporated to dryness
5. customthen chromatographed in chloroform/methanol (40:1)